Statistics For The Behavioral And Social Sciences: A Brief Course, Books A La Carte (6th Edition) (what's New In Psychology)
6th Edition
ISBN: 9780205989065
Author: Arthur Aron Ph.D., Elliot J. Coups Ph.d., Elaine N. Aron Ph.D.
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 9, Problem 2.3HD
a.
To determine
Provide the formula for the between groups population variance estimate.
b.
To determine
Explain the symbols of the formula in Part (a).
Explain the logic.
c.
To determine
Find the between-groups population variance estimate for these scores.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A client of a commercial rose grower has been keeping records on the shelf-life of a rose. The client sent the following frequency distribution to the grower.
Rose Shelf-Life
Days of Shelf-Life Frequency fi
1-5
2
6-10
4
11-15
7
16-20
6
21-25
26-30
5
2
Step 2 of 2: Calculate the population standard deviation for the shelf-life. Round your answer to two decimal places, if necessary.
A market research firm used a sample of individuals to rate the purchase potential of a particular product before and after the individuals saw a new television commercial about the product. The purchase potential ratings were based on a 0 to 10 scale, with higher values indicating a higher purchase potential. The null hypothesis stated that the mean rating "after" would be less than or equal to the mean rating "before." Rejection of this hypothesis would show that the commercial improved the mean purchase potential rating. Use = .05 and the following data to test the hypothesis and comment on the value of the commercial.
Purchase Rating
Purchase Rating
Individual
After
Before
Individual
After
Before
1
6
5
5
3
5
2
6
4
6
9
8
3
7
7
7
7
5
4
4
3
8
6
6
What are the hypotheses?H0: d Ha: d
Compute (to 3 decimals).Compute sd (to 1 decimal).
What is the p-value?The p-value is
What is your decision?
Why would you use a histograph or bar graph? Which would be better and why for the data shown.
Chapter 9 Solutions
Statistics For The Behavioral And Social Sciences: A Brief Course, Books A La Carte (6th Edition) (what's New In Psychology)
Ch. 9 - Prob. 1.1HDCh. 9 - (a) What is the within-groups population variance...Ch. 9 - What is the between-groups population variance...Ch. 9 - What are two sources of variation that can...Ch. 9 - Prob. 1.5HDCh. 9 - For part (c) of each question, use the following...Ch. 9 - For part (c) of each question, use the following...Ch. 9 - Prob. 2.3HDCh. 9 - For part (c) of each question, use the following...Ch. 9 - For part (c) of each question, use the following...
Ch. 9 - Prob. 2.6HDCh. 9 - Give three assumptions for the analysis of...Ch. 9 - Prob. 3.3HDCh. 9 - What is the general rule about when violations of...Ch. 9 - (a) What is a planned contrast? (b) Why do...Ch. 9 - Prob. 4.2HDCh. 9 - Prob. 4.3HDCh. 9 - Prob. 4.4HDCh. 9 - Prob. 4.5HDCh. 9 - (a) What is a planned contrast? (b) Why do...Ch. 9 - Prob. 5.2HDCh. 9 - Prob. 5.3HDCh. 9 - Prob. 5.4HDCh. 9 - Prob. 5.5HDCh. 9 - Prob. 6.1HDCh. 9 - Prob. 6.2HDCh. 9 - Prob. 6.3HDCh. 9 - Prob. 6.4HDCh. 9 - Prob. 6.5HDCh. 9 - For each of the following studies, decide whether...Ch. 9 - For each of the following studies, (a) and (b),...Ch. 9 - A psychologist at a private psychiatric hospital...Ch. 9 - What is the Bonferroni corrected significance...Ch. 9 - For each of the following studies, test whether a...Ch. 9 - What is the power of each of the following planned...Ch. 9 - Prob. 9PPCh. 9 - Grilo and colleagues (1997) are clinical...Ch. 9 - A researcher wants to know whether the need for...Ch. 9 - Prob. 12PPCh. 9 - For each of the following studies, decide whether...Ch. 9 - For each of the following studies, (a) and (b),...Ch. 9 - Do students at various universities differ in how...Ch. 9 - What is the Bonferroni corrected significance...Ch. 9 - Prob. 20PPCh. 9 - Prob. 21PPCh. 9 - Prob. 22PPCh. 9 - Prob. 23PPCh. 9 - Prob. 24PPCh. 9 - Miller (1997) asked 147 female students to view...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- Please help me with this question on statisticsarrow_forwardPlease help me with this statistics questionarrow_forwardPlease help me with the following statistics questionFor question (e), the options are:Assuming that the null hypothesis is (false/true), the probability of (other populations of 150/other samples of 150/equal to/more data/greater than) will result in (stronger evidence against the null hypothesis than the current data/stronger evidence in support of the null hypothesis than the current data/rejecting the null hypothesis/failing to reject the null hypothesis) is __.arrow_forward
- Please help me with the following question on statisticsFor question (e), the drop down options are: (From this data/The census/From this population of data), one can infer that the mean/average octane rating is (less than/equal to/greater than) __. (use one decimal in your answer).arrow_forwardHelp me on the following question on statisticsarrow_forward3. [15] The joint PDF of RVS X and Y is given by fx.x(x,y) = { x) = { c(x + { c(x+y³), 0, 0≤x≤ 1,0≤ y ≤1 otherwise where c is a constant. (a) Find the value of c. (b) Find P(0 ≤ X ≤,arrow_forwardNeed help pleasearrow_forward7. [10] Suppose that Xi, i = 1,..., 5, are independent normal random variables, where X1, X2 and X3 have the same distribution N(1, 2) and X4 and X5 have the same distribution N(-1, 1). Let (a) Find V(X5 - X3). 1 = √(x1 + x2) — — (Xx3 + x4 + X5). (b) Find the distribution of Y. (c) Find Cov(X2 - X1, Y). -arrow_forward1. [10] Suppose that X ~N(-2, 4). Let Y = 3X-1. (a) Find the distribution of Y. Show your work. (b) Find P(-8< Y < 15) by using the CDF, (2), of the standard normal distribu- tion. (c) Find the 0.05th right-tail percentage point (i.e., the 0.95th quantile) of the distri- bution of Y.arrow_forward6. [10] Let X, Y and Z be random variables. Suppose that E(X) = E(Y) = 1, E(Z) = 2, V(X) = 1, V(Y) = V(Z) = 4, Cov(X,Y) = -1, Cov(X, Z) = 0.5, and Cov(Y, Z) = -2. 2 (a) Find V(XY+2Z). (b) Find Cov(-x+2Y+Z, -Y-2Z).arrow_forward1. [10] Suppose that X ~N(-2, 4). Let Y = 3X-1. (a) Find the distribution of Y. Show your work. (b) Find P(-8< Y < 15) by using the CDF, (2), of the standard normal distribu- tion. (c) Find the 0.05th right-tail percentage point (i.e., the 0.95th quantile) of the distri- bution of Y.arrow_forward== 4. [10] Let X be a RV. Suppose that E[X(X-1)] = 3 and E(X) = 2. (a) Find E[(4-2X)²]. (b) Find V(-3x+1).arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman
The Shape of Data: Distributions: Crash Course Statistics #7; Author: CrashCourse;https://www.youtube.com/watch?v=bPFNxD3Yg6U;License: Standard YouTube License, CC-BY
Shape, Center, and Spread - Module 20.2 (Part 1); Author: Mrmathblog;https://www.youtube.com/watch?v=COaid7O_Gag;License: Standard YouTube License, CC-BY
Shape, Center and Spread; Author: Emily Murdock;https://www.youtube.com/watch?v=_YyW0DSCzpM;License: Standard Youtube License