1) Derived scores help interpret raw scores and make them comparable by expressing them in terms of standard deviations from the mean.
2) There are two main types of derived scores - standard scores (z-scores) which indicate how many standard deviations a score is from the mean, and percentile ranks which show the percentage of scores in the group that are the same or lower.
3) Z-scores are calculated using the formula z = (x - M) / SD, where x is the raw score, M is the mean, and SD is the standard deviation. This expresses how many standard deviations a score is from the mean.
Biserial correlation is computed between two variables when one of them is in continuous measure and the other is reduced to artificial dichotomy (forced division into two categories). This Presentation slides explains the condition and assumption to use biserial correlation with appropriate illustrations.
Characteristics Of A Good Test, Measuring Instrument (Test)
Validity, Nature/Characteristics Of Validity
Types/Approaches To Test Validation
Validity: Advantages And Disadvantages
Reliability, Nature/Characteristics
Types Of Reliability
Methods Of Estimating Reliability
Practicality/Usability
Objectivity
Norms
The phi coefficient is that system of correlation which is computed between two variables, where neither of them is available in a continuous measures and both of them are expressed in the form of natural or genuine dichotomies. This presentation slides describes the concept and procedures to do the computation of phi coefficient of correlation.
Parametric vs Nonparametric Tests: When to use whichGönenç Dalgıç
There are several statistical tests which can be categorized as parametric and nonparametric. This presentation will help the readers to identify which type of tests can be appropriate regarding particular data features.
Describes student’s performance or progress in relation to others of the same peer group, age Or ability.
▪ Assessment to determine how a person performed in comparison with that of a group.
criterion referenced
Compares An Individual's Performance To The Acceptable Standard Of Performance
For Those Tasks.
▪ Designed To Measure Student Performance Against A Fix Set Of Predetermined Criteria
For A Specific Grade Level.
Biserial correlation is computed between two variables when one of them is in continuous measure and the other is reduced to artificial dichotomy (forced division into two categories). This Presentation slides explains the condition and assumption to use biserial correlation with appropriate illustrations.
Characteristics Of A Good Test, Measuring Instrument (Test)
Validity, Nature/Characteristics Of Validity
Types/Approaches To Test Validation
Validity: Advantages And Disadvantages
Reliability, Nature/Characteristics
Types Of Reliability
Methods Of Estimating Reliability
Practicality/Usability
Objectivity
Norms
The phi coefficient is that system of correlation which is computed between two variables, where neither of them is available in a continuous measures and both of them are expressed in the form of natural or genuine dichotomies. This presentation slides describes the concept and procedures to do the computation of phi coefficient of correlation.
Parametric vs Nonparametric Tests: When to use whichGönenç Dalgıç
There are several statistical tests which can be categorized as parametric and nonparametric. This presentation will help the readers to identify which type of tests can be appropriate regarding particular data features.
Describes student’s performance or progress in relation to others of the same peer group, age Or ability.
▪ Assessment to determine how a person performed in comparison with that of a group.
criterion referenced
Compares An Individual's Performance To The Acceptable Standard Of Performance
For Those Tasks.
▪ Designed To Measure Student Performance Against A Fix Set Of Predetermined Criteria
For A Specific Grade Level.
This is my report in my Assessment II subject. I am assigned to discuss on how to interpret test scores by standard deviation unit, Z-score, T-score, Stanine, Deviation IQ and NCE.
Variability, the normal distribution and converted scoresNema Grace Medillo
Understanding mean and standard deviation in the normal distribution curve, Understanding scores using range, semi-interquartile range, standard deviation and variance. Converting scores through z- scores and t - scores,
Work hard to make certain that the results you have are accurate b.docxkeilenettie
Work hard to make certain that the results you have are accurate based on class material.
Use T- table and Z-table when needed.
Feel free to consult and cite the notes and previous assignments in preparing this exam.
Please show all of your working out so I am able to see your path to your answer. Mistakes will be penalized however showing your working out will allow me to deduct fewer points. If no working out is shown, I will be forced to deduct full points for mistakes.
**
.
Z table and T table are attached.
Please read carefully
!
When appropriate and possible, express your answer in the same units as the variable.
For example, if the question asks for the mean years of formal education and you have calculated the mean to be 18.44, your answer should be expressed as “
18.44 years of formal education
.”
Equations to Use
Median Position = N+1/2
The
Median Value
is the midpoint between the scores.
Mean
=
å
x
/ N
Standard Deviation =
Z score =
x – mean / standard deviation
CI =
For samples sizes ≥ 100,
the formula for the
CI
is:
CI
=
(the sample mean) + & - Z(
s / √N – 1)
CI =
For samples sizes < 100,
the formula for the
CI
is:
CI
=
(the sample mean) + & - T(
s / √N – 1)
Please answer the following questions:
You are interested in the effects of release with aftercare for a small number of drug offenders. The number of additional months without drug use for a sample
of 6 offenders
is recorded. The data on the six (6) subjects are as follows:
2
8
5
2
8
2
What are the
median position
and the
median value
?
(3 points)
What is the mean?
(
2 points)
What is the most frequently occurring score in this distribution of scores - mode?
(2 point)
2. Computation of a mode is most appropriate when a variable is measured at which level?
(2 points)
A. interval-ratio
B. ordinal
C. nominal
D. discrete
Answer: ________________________
3.
Assume that the distribution of a college entrance exam is normal with
a mean of 500 and a standard deviation of 100
.
For each score below, find the equivalent Z score, the percentage of the area above the score, and the percentage of the area below the score.
( 5 each = total 10 points)
Score Z score % Area Above % Area Below
a) 437
b) 526
4. The class intervals below represent ages of respondents. Which list is both exhaustive and mutually exclusive?
(2 points)
A. 119–120, 120–121, 121–122
B. 119–120, 121–122, 123–124
C. 119–121, 123–125, 127–129
D. 119–120, 122–123, 125–126
Answer: ______________________
5. The parole board is alarmed by the low number of years actually spent in prison for those inmates sentences to 15-year sentences. To help them make parole recommendations they gather data on the number of years served for a small sample of 7 (
seven) p
otential parolees. The number of years served for these seven parol.
The OERs: Transforming Education for Sustainable Future by Dr. Sarita AnandDr. Sarita Anand
This ppt is made for M.Ed.,(M.A. Education) and Ph.D. level student's OER related knowledge and course content. The ET & ICT in Teacher Education is highly concerned with lesson plan and content requirement and creation in daily teaching. So, this PPT on OER will help them to know the enormous platforms of OER available to use, reuse, remix for any level of education in general and in higher education particularly. Student will be not only be aware of it but also explore and use for a sustainable future of education system.
This PPT will also be helpful for the Teachers and Teachers Educators for becoming the OER literate and frequent users.
This ppt is made for the students of M.Ed., M.A.(Education) and Ph.D. Level students who are studying Educational research methodology.
This will help them understand the concept sampling error.
This ppt is made for students studying in M.Ed., M.A. (Education) and Ph.D. level. Other teachers, teacher Educators may use it as an e-content. This PPT slides can help students to not only understand the concept but also to organize the case study in to a structured information giving a clear and concise format, making it easier for users to navigate and understand the key points. It will help students/users to prioritize visual appeal, accessibility, and ease of sharing, and can be treated as an e-content for the students as well as teachers.
Plagiarism, Types & Consequences by Dr. Sarita AnandDr. Sarita Anand
This ppt is made for M.Ed.,(M.A. Education) and Ph.D. level students specially related with their research purpose. The Research methodology of any subject is highly concerned about ethical practices in daily academic life. It will help them learn how to maintain the academic integrity in higher education. Student will be aware of cheating and its consequences. Suggesting avoiding plagiarism is essential for ethical and academic integrity.
This ppt is made for Ph.D. Scholars, M.Ed., M.A.Education and other PG students. The advance version of this ppt in MP4 is available at https://www.youtube.com/watch?v=O2qMwrmUbe0
Learning Management System: An Essential Educational TechnologyDr. Sarita Anand
This ppt will be helpful for all subject's Teachers, Teacher Educators, Pupil Teachers, Prospective Teacher Educators, Ph.D. scholars, M.A. Education students for their online teaching and learning management system.
This PPT is prepared as a tutorial or basic guide for Teachers of all the disciplines, teacher educators, prospective teachers to help them organizing video conferencing to take online classes, webinars, and meetings in this time of COVID-19 & lock down.
This presentation is for Action Research in Education specially for researchers in education and social sciences. Also useful for B.Ed., M.Ed. M.A. education and Ph.D. students.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
1. DR. SARITA ANAND
ASSISTANT PROFESSOR
DEPARTMENT OF EDUCATION
VINAYA BHAVANA (INSTITUTE OF EDUCATION)
VISVA-BHARATI, SANTINIKETAN
sarita.anand@visva-bharati.ac.in
DERIVED SCORES
3. Derived Score
In order to interpret the scores properly or to make
them comparable we convert the raw scores into
derived scores.
The derived scores help us to know the position of an
individual in his group and we can compare the
performance with others. “A derived score is a
numerical description of an individual’s
performance in terms of norms.”
3
4. Derived Score
The derived scores have several uses like:
(a) It helps to know the position of an individual in his
group by knowing how many standard deviation
units above or below the mean he falls.
(b) Standard score obtained on two tests may be
directly compared.
(c) It can be converted into other types of scores such
as percentile norm.
Two types-
(A) Standard Score (z-score or o-score).
(B) Percentile Ranks.
4
5. (A) Standard Scores or
z-Score (Small z Score)
Standard scores also indicate the relative position of a
pupil in a group by showing how far the raw score is
above or below average.The standard scores
express the performance of pupils in standard
deviation unit.
This gives us a standard score, usually denoted by
a-score, (read as sigma-‘z’) is obtained by the
formula:
z(or, σ-score) = X – M/SD
where X = score of the individual
M = Mean of the group
5
6. (A) Standard Scores
The standard scores represent ‘measurements’ from
the mean in S.D. units. The standard score
indicates how far a particular score is removed
from the mean of the distribution in terms of S.D.
of the distribution. Standard scores conform to
the concept of the normal distribution. In case of
standard scores, the difference between score
units are hypothesized to be equal.
6
7. Example 1:
In a test the marks obtained byVicky is 55, the class-
mean being 50 and the S.D. being 10.
...Vicky’s z-score = X-M/SD = 55-50/10 = 1/2 or .5
Thus the raw score of 55 is expressed as 1/2z or .5z
(or 1/2σ or .5 σ) in terms of standard score.
In other words,Vicky’s score is at .5σ (i.e. 1/2 sigma
distance) from the mean or, his score is 1/2σ above
the mean.
(A) Standard Scores
7
8. Example 2:
Rakesh’s score in a test is 49.The class mean is 55
and the SD is 3.
... Rakesh’s z-score = X-M/SD = 49-55/3 = -2
The raw score of Rakesh i.e. 49 can be expressed
as – 2z or – 2σ.
Rakesh’s score is at 2 sigma distances from the
mean or his score is 2σ below the mean.
8
9. Example 3:
In a test marks obtained by three students are as
follows. The mean = 40, SD = 8. Assuming normal
distribution what are their z-score (sigma-score)
9
10. Let us discuss what these standard scores
mean. We know what a normal curve is.
These z-scores can be shown on the base line
of that curve, so that we can know their
position in the group (or class) to which they
belong.
10
11. From the above diagram we can know the percentage of
students above and below each student.
Below A there are 50 + 34.13 = 84.13% and above A 100 –
84.13 = 15.87% of pupils. We can also say that A is at a
distance of + 1σ above the mean.
Below B, there are 50 + 34.13 + 13.59 = 97.72% and above
B 100 – 97.72 = 2.28% of students. Again B is at a
distance of + 2σ above the mean.
C’s position is just in the middle of the group. So below C
there are 50% and above C 50% of the group. 11
12. Example 4:
From the data on a test of Arithmetic given below,
whose performance is the best?
Now Amit is 1σ above the mean, Kishore is .5a
above the mean and Shyam is 2σs above the mean.
Thus Shyam’s performance in the test of Arithmetic is the
best.
12
13. Example 5:
The mean of a normal distribution is 32 and SD is 10.
What percent of cases will be between 22 and 42?
Z- Score of 22 = 22 – 32/10 = -1σ
Z- Score of 42 = 42 – 32/10 = +1σ
We know the position of +1σ and -1σ in the normal
curve. Score 22 is at a distance of – 1σ and score 42
at a distance of+1σ from the mean.
So, the required percent = 34.13 + 34.13 = 68.26. In
other words there are 68.26% of cases between 22
and 42.
13
14. Example 6:
In a symmetrical distribution, mean = 20 and σ = 5.
What percent of cases lie above 30?
z-score of 30 = 30-20/5 = + 2σ.
So, score 30 is at a distance of +2σ from the mean.
So percent of cases above 30
= 100 – (50 + 34.13 + 13.59)
= 100 – 97.72 = 2.28.
14
15. Example 7:
Radhika’s score in a test of science is given below (Section-A).
Express her score in terms of the scores in Section-B i.e., what
will be the equivalent score of Radhika in section-B?
Radhika’s score is la distance above the mean.
As the standard scores are equal, in section-B also Radhika will
secure 1σ2 i.e. 10 more than M2.
Therefore, in section-B Radhika’s score X2 = M2 + 1σ2 = 60 + 10 = 70.
Thus, X1 score of 55 = X2 score of 70. 15
16. The above Question can also be calculated by putting
the values directly in the formula:
16
17. Properties of the standard score
or z-score:
A score becomes significant only when it is
comparable with other scores. Raw scores
become meaningful when they are converted
into derived scores’ or z-scores.
17
18. The derived score’s properties:
1. A z-score has a mean of 0 and standard deviation of 1.
2. We can know the relative position of an individual in
the whole group by expressing the raw score in terms
of a distances above or below the mean.
3. Standard score differences are proportional to raw
score differences.
4. Standard scores on different tests are directly
comparable.
5. One type of standard score can be converted into
another type of standard score.
6. From the formula, z-score = raw score –
mean/standard deviation = X-M/SD, 18
19. Conclusion
it can be derived that:
(i) If the raw score = mean, z-score is Zero;
(ii) If the raw score > mean, z-score is positive;
(iii) If the raw score < mean, z-score is negative.
19
20. Advantages of z-scores:
(i) They permit us to convert raw scores into a
common scale which has equal units and which
can be readily interpreted.
(ii) They give us an idea of how well a teacher-made
test is. A good teacher- made test designed to
discriminate among students will generally have a
range between 4 and 5 SDs, i.e., 2.0 to 2.5 SDs on
either side of the mean.
Limitations:
They involve the use of decimals and negative
numbers.
20
21. Z-score
The standard scores or z-scores involve decimals and
directional signs. To avoid this the z-value is multiplied
by’ 10 and then 50 is added to it. The new score is called
Z-score.
Thus, Z-score is a standard score on the scale with a mean
of 50 and SD of 10.
The formula for computing Z-score is:
21
22. Example:
In a test the mean is 50 and SD is 4. Convert a score
of 58 to small z-score and capital score.
Z-score
22
23. T-score (Mc Call’s score)
Mc Call suggested a scale with a mean of 50 and a SD of 10 to be used
when the distribution is normal.
T-score enjoys advantage over standard scores as in it the negative or
fractional standard scores can be avoided. (T-score is named after
Thorndike andTerman).
T-score = 50 + 10z
When this formula is applied z is read from the table of normal curve.
Suppose a score of 63 surpasses 84% of cases of the group. Referring
to the table of normal curve we find that such a score is at one
sigma distance from the mean i.e. its σ- distance or z = 1.
So theT-score equivalent of this score, 63
= 50 + 10z
= 50 + 10 x 1 = 60
Here, in theT-scale it is assumed that the distribution is normal.
This is whyT-score is called a “normalized standard score.” 23
24. In this scale the assumption is that nearly all scores will be within
a range of 5 SDs from the mean. Since each SD is divided into
10 units, the T-score is based on a scale of 100 units, thus it
avoids the negative and fractional standard scores.
Generally the Z value is read from the table of area under normal
curve.
24
25. Example:
Suppose Deepak’s score 75 surpasses 84% of cases of
the group. Express it in terms of T-score i.e. find out
the equivalentT-score of 75.
Now referring to the area under normal probability
curve, it will be found that at 1 a distance it will
surpass 84% of cases. In other words the score 75 is
at 1σ distance from mean.
Therefore z = 1.
So,T-score of 75 = 50 + 10z
= 50 + 10 x 1
= 60.
25
26. H-score (Hull’s scale)
Hull suggested a scale with mean 50 and SD 14. If H
is a score in Hull’s scale, the formula for
comparison of marks will be
26
27. Example:
ExpressAmit’s raw score of 55 in terms of H-score.
Score = 55, Mean = 50 and SD = 5.
H-score (Hull’s scale)
27
Reference: https://www.yourarticlelibrary.com/statistics-2/classification-of-score-raw-score-and-derived-score/92557