This document provides guidance for a math class on proportional relationships. It introduces direct and inverse proportionality, explaining how to recognize each type of relationship in contextual situations. It also explains how to use direct and inverse rules of three to solve problems involving proportional magnitudes. Students are provided multiple word problems to practice applying direct and inverse rules of three to determine unknown values. The document aims to help students recognize the type of proportionality in contexts and solve such problems.
For these problems, please use Excel to show your work, and submit.docxtemplestewart19
For these problems, please use Excel to show your work, and submit the Excel spreadsheet along with your completed assignment.
Find the point estimate of the population mean and the margin of error for a 90% confidence interval for the following drive times (in minutes) for commuters to a college.
35
40
47
22
17
19
36
44
65
55
22
23
16
46
44
38
29
22
37
16
8
15
27
41
45
17
11
45
63
17
28
19
64
55
53
50
Answer:
X
=
S
=
1231
= 34.1 Sample Mean
n
36
Use the results from the above data (#1) and determine the minimum survey size that is necessary to be 95% confident that the sample mean drive time is within 10 minutes of the actual mean commuting time.
In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for this. Assume the annual maintenance costs are normally distributed.
Answer:
90% = mean ± 1.645 SEm
SEm = SD/√n
I used the table in the back of my statistics text labeled "areas under normal distribution" to find the proportion/probability (±5%) to get Z = 1.645. I assume that you have a similar table available.
The following data represents the number of points scored by players on a high school basketball team this season.
Player 1
68
Player 6
128
Player 2
82
Player 7
66
Player 3
145
Player 8
54
Player 4
111
Player 9
221
Player 5
97
Player 10
99
Find the sample mean and the sample standard deviation.
Answer:
Sample Mean
1071
= 107.1
Sample Standard Deviation S = 3.16
10
Construct a 90% confidence interval for the population mean and interpret the results. Assume the population of the data set is normally distributed.
For the following statements, state the null and alternative hypotheses and identify which represents the claim. Determine when a type I or type II error occurs for a hypothesis test of the claim. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed, and explain your reasoning. Explain how you should interpret a decision that rejects the null hypothesis. Explain how you would interpret a decision that fails to reject the null hypothesis.
It is reported that the number of residents in Wisconsin who support plans to recall the governor is 48%.
An Amish bakery store states that the average shelf life of their fresh baked goods is seven days.
A soda manufacturer states that the average number of calories in the regular soda is less than 150 calories per serving.
The census figures show that the average income for a family in a rural region is approximately $34,860 per year. A random sample has a mean income of $33,566 per year, with a standard deviation of $1,245. At a sig. level of .0.01 is there enough evidence to reject the claim? Explain.
An advertising firm claims that the average expenditure for advertising for their customers is at least $12,500.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
For these problems, please use Excel to show your work, and submit.docxtemplestewart19
For these problems, please use Excel to show your work, and submit the Excel spreadsheet along with your completed assignment.
Find the point estimate of the population mean and the margin of error for a 90% confidence interval for the following drive times (in minutes) for commuters to a college.
35
40
47
22
17
19
36
44
65
55
22
23
16
46
44
38
29
22
37
16
8
15
27
41
45
17
11
45
63
17
28
19
64
55
53
50
Answer:
X
=
S
=
1231
= 34.1 Sample Mean
n
36
Use the results from the above data (#1) and determine the minimum survey size that is necessary to be 95% confident that the sample mean drive time is within 10 minutes of the actual mean commuting time.
In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for this. Assume the annual maintenance costs are normally distributed.
Answer:
90% = mean ± 1.645 SEm
SEm = SD/√n
I used the table in the back of my statistics text labeled "areas under normal distribution" to find the proportion/probability (±5%) to get Z = 1.645. I assume that you have a similar table available.
The following data represents the number of points scored by players on a high school basketball team this season.
Player 1
68
Player 6
128
Player 2
82
Player 7
66
Player 3
145
Player 8
54
Player 4
111
Player 9
221
Player 5
97
Player 10
99
Find the sample mean and the sample standard deviation.
Answer:
Sample Mean
1071
= 107.1
Sample Standard Deviation S = 3.16
10
Construct a 90% confidence interval for the population mean and interpret the results. Assume the population of the data set is normally distributed.
For the following statements, state the null and alternative hypotheses and identify which represents the claim. Determine when a type I or type II error occurs for a hypothesis test of the claim. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed, and explain your reasoning. Explain how you should interpret a decision that rejects the null hypothesis. Explain how you would interpret a decision that fails to reject the null hypothesis.
It is reported that the number of residents in Wisconsin who support plans to recall the governor is 48%.
An Amish bakery store states that the average shelf life of their fresh baked goods is seven days.
A soda manufacturer states that the average number of calories in the regular soda is less than 150 calories per serving.
The census figures show that the average income for a family in a rural region is approximately $34,860 per year. A random sample has a mean income of $33,566 per year, with a standard deviation of $1,245. At a sig. level of .0.01 is there enough evidence to reject the claim? Explain.
An advertising firm claims that the average expenditure for advertising for their customers is at least $12,500.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
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.
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.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
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!
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
1. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
Para desarrollarla presente guíade trabajo, ten encuenta lo siguiente:
Puedes encontrarlaclase Matemáticas Ciclo3 en laplataformade Google Classroom.El códigode la clase
aocvekk
Debestomar apuntesdel temaen tu cuaderno,hazlodesde la secciónde estructuración,desarrollatodas
las actividades propuestas y entrega tu trabajo en un archivo PDF a través de la plataforma Google
Classroom.
Los criterios para la valoración del trabajo son los siguientes:
Calidad:Dedique el tiemponecesariopararealizarunbuentrabajo,realice el procedimientoadecuadoy
rectifique susrespuestas,seaorganizadoyresuelvatodoslosejercicios.
Autenticidad: Es preciso que sea usted quien realice su trabajo, esto fortalece su aprendizaje y
mejoramiento.
Estética:Presente untrabajoordenado,conbuena letra, evite tachones. Fotos nítidas y bien enmarcadas
Cumplimiento: Cargue la evidencia del desarrollo de la actividad en la plataforma Google Classroom en el
tiempo establecido para ello
Recuerda que tu trabajo debe ser entregado bien organizado y debe estar completa y correctamente
desarrollado. En caso contrario,seráDEVUELTO para que lo completesy/ocorrijas.Además,enel casoen
el que se detecte plagioo copia, el trabajo será devueltoy debenhacerlo nuevamente,tantoel que copia
como el que prestasu trabajo y se calificaránsobre la nota mínima. Esto implicatambién,anotaciónenel
observador y baja en la nota de disciplina.
En losreportesúnicamente apareceránaquellostrabajosque estánbiendesarrollados, cumplencontodas
las actividades y no contienen ni son objeto de plagio.
Revisa y aprópiate de sitios virtuales donde puedas afianzar los aspectos que no hayas entendido o que
quierasreforzar,te sugieroobservesconatención losvidesoque se encuentranen los siguientes enlaces:
https://www.youtube.com/watch?v=nP9SwAqhVTI Proporcionalidaddirecta
https://www.youtube.com/watch?v=uQO_oBKqypQ Reglade tressimple directa.Ejemplo1
https://www.youtube.com/watch?v=coFniew1W40 Proporcionalidaddirectae inversa
https://www.youtube.com/watch?v=WzcLzSY9JLA Reglade tressimple inversa
https://www.youtube.com/watch?v=X_2Ooogxqn4 Reglade tresSimple Inversa|Ejemplo1
https://www.youtube.com/watch?v=OyEcoAV3oFY&t=67s Reglade tres ¿cómoreconocersi es directao
inversa
ÁREAS: Matemáticas GRADO: Ciclo3 IntensidadHoraria: 3h semanales
PERIODO: IV Guía 1 Fecha: Del 27 de septiembre al 8de octubre
Docentes:Tatiana RojasAgámez
DBA: Identificasi enunasituacióndadalasvariablessondirectamenteproporcionalesoinversamente
proporcionales o ninguna de las dos. Reconoce características necesarias para garantizar la
proporcionalidad.
Tema: Proporcionalidaddirecta
y proporcionalidadinversa
Objetivo:reconocerel tipode proporcionalidadque se presentaen
situaciones contextualizadas yresolverlas.
2. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
Una proporción es la relación que existe entre dos variables, de tal manera que si una de ellas es afectada la
otra también cambia.
Porejemplo:Enunarecetade cocinalacantidaddeporcionesque sevanaprepararylacantidadde ingredientes
que se usarán.
Así que,mientrasmás porcionesse quierenpreparar se entiende que se usanmásingredientes.
Ejemplo: Variable cantidad de huevos versus variable valor del huevo
Cantidad de huevos Valor del huevo en $
1 huevo $ 100
2 huevos $ 200
10 huevos $ 1000
30 huevos $ 3000
Podemos ver, si la variable “cantidad de huevos” sube, la otra variable“valor del
huevo” también sube y viceversa si la cantidad de huevos disminuye entonces
el valor del huevo también disminuye
Entonces decimos que estas variables son DIRECTAMENTE PROPORCIONALES
EXPLORACIÓN
¿Recuerdas el concepto de
proporción?
ESTRUCTURACIÓN
3. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
Para calcular proporciones directas usamos la regla de tres.
LA REGLA DE TRES SIMPLE DIRECTA
Es un procedimiento que se utiliza para resolver problemas que se pueden representar mediante una
proporción y en los cuales se conocen tres de los cuatro datos que forman la proporción y se requiere
hallar el cuarto.
Ejemplo: Si 1 huevo cuesta $100, ¿Cuánto cuestan 5 huevos?
Para solucionar una regla de tres simple directa se deben seguir los siguientes pasos:
Step 1: Pregúntate: ¿Hay una relación de proporcionalidad directa entre las magnitudes?
Si la respuesta es afirmativa ve al paso 2
Step 2: Organiza los datos de acuerdo con las magnitudes.
Step 3: Plantea una proporción
Step 4: Aplica la propiedad fundamental de las proporciones para calcular el valor
desconocido.
VEAMOS EL SIGUIENTE EJEMPLO:
En una distribuidorade arrozvenden500 gramosen $3500. ¿ a qué preciose debenvender
1250 gramos de arroz?
Solución:
Step 1: ¿Hay una relacióndirectaentre el pesodel arroz(gramos) yel precio?Rta: Si,porque a
mayor peso,mayorprecioyviceversa
Step 2: Organizar losdatosde acuerdo a lasmagnitudes
Peso(gr) Precio($)
500 3500
1250 x
Step 3: Plantearunaproporción
500
1250
=
3500
𝑥
Step 4: Aplicarlapropiedadfundamental de lasproporcionesparacalcularel valordesconocido.
500 • x = 1250 • 3500 → Despejamoslaincógnita
𝑥 =
1250⋅3500
500
=
4375000
500
= 8750 Respuesta: 1250 gramos de arroz cuestan $8750
4. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
Usa la regla de tres directa para resolver las siguientes situaciones.
a) La señora Juanita cocina tortas, si con 10 huevos ella cocina 1 torta, ¿Cuántas tortas puede
cocinar con 40 huevos?
b) Un automóvil recorre 200 kilómetros con 30 litros de gasolina. ¿Cuántos kilómetros
puede recorrer con 75 litros de gasolina?
c) Francisco gana $5.000 por repartir 1.000 volantes. ¿Cuántos volantes debe repartir
para ganar $65.000?
d) En un viaje de Acacías a Granada, que se encuentran a una distancia de 50 km, un automóvil
consume 20 litros de gasolina, si quiero hacer un viaje más largo de 120 km ¿Cuántos litros de
gasolina va a consumir el automóvil?
5. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
Ejemplo de proporción inversa: cantidad de trabajadores versus el tiempo que se demoran en
realizar el trabajo.
Es decir, si un trabajo lo hacen más trabajadores se demoran menos en terminar, o si son
menos trabajadores se demoran más en terminar.
Menos tiempo
en terminar el
trabajo.
Más trabajadores
Menos trabajadores
Más tiempo en
terminar el
trabajo.
LA REGLA DE TRES SIMPLE INVERSA
La reglade tressimple inversaesunprocedimientoque nospermitecalcularel valorde unacantidad,conociendo
otras tres cantidades relacionadas a través de una proporcionalidad inversa
Cuando dos magnitudes son inversamente
proporcionalessiunade ellasaumentalaotradisminuye
y viceversa.
6. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
a) Si 20 trabajadores se demoran 100 días en terminar de pavimentar una calle. ¿Cuántos días se
demoran en pavimentar la misma calle solo 5 trabajadores?
La diferencia entre una regla de tres directa y una inversa es que en este caso no multiplicamos en cruz,
multiplicamos horizontalmente.
Step 1: Identificamos las magnitudes que intervienen en la situación; en este caso son: númerode patos y
tiempoque tardanencomer el alimento endías
patos tiempo(Días)
20 10
40 x La proporcionalidadesinversa ya que a más patos menostiempodurará el alimento
Step 2: PlanteamosyresolvemoslaecuaciónmultiplicandoenformaHORIZONTALporque la relaciónesINVERSAy
la resolvemosasí:
20 • 10 = 40 • x → Despejamoslaincógnita
𝑥 =
20⋅10
40
=
200
40
= 5 Rta: Los 40 patos tardarán 5 días en terminar el alimento
Pararesolverunareglade tressimple inversa,tendremosencuentaelhechode que el productode lascantidades
correspondientes se mantiene constante, por tanto en la regla de tres:
Magnitud 1 Magnitud 2 A • B = C • x
A B
C x
Analiza el ejemplo:
En una granja, 20 patos tardan 10 días en comer el alimento
que hay guardado. ¿Cuánto tiempo tardarán 40 patos en
terminar el alimento?
7. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria
b) Un automóvil viaja a 100 kilómetros por hora y se demora 4 horas en llegar asu destino,
¿Cuánto se demora si aumenta la velocidad a 120 kilómetros por hora?
c) Una llave de agua llena una piscina en 15 horas, ¿Cuánto se demoran en llenar la misma piscina
5 llaves de agua?
d) Un hotel contrata 4 empleados para arreglar el jardín y tardan 18 días en hacer el trabajo. Si en el hotel
quieren que el jardín quede listo en 12 días, ¿Cuántos empleados tienen que contratar?
PREGUNTAS PARA REFLEXIONAR
¿Cuál era nuestro objetivo?
Reconocer el tipo de
proporcionalidad que se presenta
en situaciones contextualizadas y
resolverlas.
1.- ¿Qué he aprendido hoy?
2.- ¿Cómo lo he aprendido?
3.- ¿Para qué me sirve?
4.- ¿En qué otras situacionespuedoaplicarlo?
CIERRE
8. INSTITUCIÓN EDUCATIVA DINAMARCA
ESPECIALIDAD AGROPECUARIA
DANE 250006001048 NIT 800256502-7
Res. 5746/2013 (Educación Media) Res. 5621/2016 (Ed. Adultos)
Bachillerato Técnico Especialidad en Producción Agropecuaria