ICT Role in 21st Century Education & its Challenges.pptx
Measures of scales
1. Dr. Shanti Tejwani
Asst. Prof. M.B. Khalsa Institute of Education, Indore
shanti_tejwani@yahoo.com
2. An attributes/ characteristics of thing ,objects or
events which varies (which can different Values) is
known as Variable.
Attandence of Students
Sex
Religion
Books in library
Mode of journey
Time duration
Aggression
Anger
Age
6. Categorization of data
Classified into category
Numbers forming a nominal scale are no more
than labels used solely to identify different
categories of responses
Example:
RELIGION
Hindu –1
Christian--2
Muslim---3
Buddhism----4
7. The mode is the most frequent category –
only statistics applicable to nominal variable
Non Parametric Statistics ---- Chi- Square
9. An ordinal scale is more powerful than a nominal
scale in that the numbers possess the property of rank
order
Classification + Order
Examples : To categories people according to level of
Education
Punctuality
Home work
Cleanliness
12. An interval scale has all the properties of an ordinal scale
and the differences between the scale values can be
meaningfully interpreted
EXAMPLE
Achievement of the students
Creativity of Students
All Psychological Variable
17. Mode
Median
Arithmetic Mean
Rank Difference correlation
Product Moment Correlation
Variance
18.
19. Type of Data Numerical Descriptive
Examples
Scale Characteristics Operation Statistics
Nominal Classification but no Counting Frequency in each Gender (1=Male,
order, distance, or category 2=Female)
origin Percent in each
category
Mode
Ordinal Classification and Rank ordering Median Academic status
order but no Range (1=Professor
distance or unique Percentile ranking 2= Associate
origin Professor
3= Assistant
Professor)
20. Type of Data Numerical Descriptive
Examples
Scale Characteristics Operation Statistics
Interval Classification, order, Arithmetic Mean Temperature in
and distance but no operations that Standard deviation degrees
unique origin preserve order and Variance
magnitude
Ratio Classification, order, Arithmetic Geometric mean Age in years
distance and unique operations on Coefficient of Income
origin actual quantities variation
21. Four levels of Measurements
Nominal
◦ Measures categories
Ordinal
◦ Categories + rank and order
Interval
◦ Equal distance between any two consecutive
measures
Ratio
◦ Intervals + meaningful zeros