User Account

All Pages

homework, Basic Statistics

Assignment Help:
Problems


15. An art professor was interested in seeing what size group is best to prime the pump so to speak to encourage strangers to gather together in front of various exhibits at her art show, so she set up an experiment. In a municipal building off campus, she asked a group of two students to stand next to each other and stare intently at a wall decoration while simultaneously she asked a group of five students to do the same at the other end of the floor. For the next 30 minutes she observed passersby to see if they too looked at the decorations for more than five seconds or made comments about the artwork to members of either group.

Here is what she found: She observed 9 people make comments or look at the decorations for more than five seconds with respect to group of two (G2). Down the hallway, she observed 26 people look at the decorations or make comments to the group of five (G5). However, she found that 34 people just passed by G5 without noticing the decoration or making a comment. A smaller number (31) just walked past G2. Because G5 had more passers than participants, she concluded that placing two of her students in front of art displays would encourage strangers to do the same. Was this a good decision? Please support your answer with an appropriate test.


16. A professor is interested in knowing the correlation, if any, of students’ scores on the first exams given in her two classes.



Class 1 Class 2
92 86
90 87
89 85
82 90
88 79
92 90
100 92
91 84

Is there a significant correlation? Explain its statistical significance, if any.




17. With respect to the situation in question 16, what other test could the professor use that would yield valid results by looking for differences. What would be the statistical result of the test?

19. A professor was interested in determining if his students made significant improvements in their test scores?


Student Test 1 Test 2
Beth 86 92
Spud 87 90
Latinqua 85 89
Bubba 90 82
Spanky 79 88
Tabitha 90 92
Lisa 92 100
Jonathan 84 91




20. A professor teaches two different subjects (history and sociology) in an ethnically diverse college. She wants to know how much interest students have in prominent political figures. She reasons that knowing this will help her plan for future lectures.

She asked students to rate each person listed with a Lickert scale (a continuum with five being high and 1 being of low interest). Upon looking at the data results, she concluded that there is no need to emphasize any political figure more than the others. Indeed, she reckoned, students in each subject area rated the figures similarly, so she can pace her lessons just as she has in the past.

History students’ scores:

John Maynard Keynes 3.6
Jesus 4.1
Martin Luther King Jr. 4.0
Karl Marx 2.5
Patricia Ireland 2.6
Abraham Lincoln 4.5

Sociology students’ scores:

John Maynard Keynes 3.7
Jesus 4.2
Martin Luther King Jr. 3.9
Karl Marx 4.1
Patricia Ireland 4.0
Abraham Lincoln 3.8

Is her conclusion solid? Please provide a statistical assessment using an appropriate test to evaluate her decision.

Related Discussions:- homework

State the model and apply t-test, Studies have linked brain size in infants...

Studies have linked brain size in infants and toddlers to a number of future ailments, including autism. One study looked at the brain sizes of 30 autistic boys and 12 nonautistic

Compute the z scores, 1. Compute the z scores for the following raw scores ...

1. Compute the z scores for the following raw scores where   = 78 and the standard deviation = 4. a. 72 b. 82 c. 78 d. 87 e. 71

one-way anova and hypothesis , Suppose we wanted to compare the somatic co...

Suppose we wanted to compare the somatic complaints (as measured on a scale known as the Physical Symptom Survey or PSS) of three groups of people; nonsmokers, smokers, and people

What is the lm and is curve, Consider an economy specified by the following...

Consider an economy specified by the following:       Y = PE = C + I + G + NX                            (Income identity)       C = 400 + 0.9YD

Accounting standards aims and objectives, Accounting Standards Aims and Obj...

Accounting Standards Aims and Objectives:  The aim of this report is to understand the various changes that have taken place in the accounting standards in various countries since

Standard deviation of the sample - normal distribution, Imagine that a samp...

Imagine that a sample of 400 rental units shows that (i) the distribution of rents paid per month is not described by a normal distribution, (ii) that the mean rent of the sampl

Statistic, difference between histogram and historigram

difference between histogram and historigram

Sigma notation, Given the following pairs of random variables and comput...

Given the following pairs of random variables and compute the following sums. (NB: show your working table). 3 -7 2 10 6 11 10 12 15 14 (b) (c) (d) ?¦?2y

What is hurdle rate, What is hurdle rate? In investment spending budget...

What is hurdle rate? In investment spending budget, challenge amount is the minimal amount that an organization desires to earn when getting a venture. Hence the challenge amou

Good measure of central tendency, What are the characteristics of a good me...

What are the characteristics of a good measure of central tendency

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd