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Opinions about whether cafeine enhances test performance differ. You design a study to test the impact of drinks with different caffeine contents on students test-taking abilities. You dhoose 21 students at random from your introductory psychology course to participate in your study. You randomly assign each student to one of three drinks, each with a dfferent caffeine concentration, such thet there are seven students assigned to each drink. You then give each of them a plain capsule containing the precise quantity of caffeine that would be consumed in their designated drink and have them take an arithmetic test 15 minutes later The students receive the following arithmetic test scores

Opinions about whether cafeine enhances test performance differ. You design a study to test the impact of drinks with different caffeine contents on students test-taking abilities. You dhoose 21 students at random from your introductory psychology course to participate in your study. You randomly assign each student to one of three drinks, each with a dfferent caffeine concentration, such thet there are seven students assigned to each drink. You then give each of them a plain capsule containing the precise quantity of caffeine that would be consumed in their designated drink and have them take an arithmetic test 15 minutes later The students receive the following arithmetic test scores

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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At the α = 0.01 level of significance, what is your conclusion? You cannot reject the null hypothesis; you do not have enough evidence to say that caffeine affects test performance. You can reject the null hypothesis; caffeine does appear to affect test performance. You cannot reject the null hypothesis; caffeine does appear to affect test performance. You can reject the null hypothesis; you do not have enough evidence to say that caffeine affects test performance.
Safari Edit View History Bookmarks Window Help イ令 File A ng.cengage.com * CENGAGE MINDTAP losie v Problem Set: Chapter 12 Introduction to Analysis of Variance A My Home 7. Hypothesis testing with ANOVA e Courses Opinions about whether caffeine enhances test performance differ. You design a study to test the impact of drinks with different caffeine contents on O Catalog and Study Tools students' test-taking abilities. You choose 21 students at random from your introductory psychology course to participate in your study. You randomly assign each student to one of three drinks, each with a dfferent caffeine concentration, such that there are seven students assigned to each drink. O Rental Options You then give each of them a plain capsule containing the precise quantity of caffeine that would be consumed in their designated drink and have them take an arithmetic test 15 minutes later. F college Success Tips The students receive the following arithmetic test scores: = Career Sucess Tips RECOMMENDED FOR YOU Coffee Espresso Water Caffeine Content (mg/ox) 13.4 51.3 78 92 83 EX- 142,493 88 87 83 G-1,723 72 80 76 N-21 Maintaining Social k-3 72 89 79 Connections 64 96 86 81 83 79 82 92 81 Help T.- 537 T,- 619 T.- S67 O Give Feedback Ss, - 381.43 Ss, - 185.71 Ss,- 66 M, - 76.7143 M,- 81.0000 M.- 88.4286 You plan to use an ANOVA to test the impact of drinks with different caffeine contents on students' test-taking abties, What is the null hypotheis? The population mean test scores for all three treatments are equal. The population mean test scores for all three treatments are not all equal The population mean test score for the water population is different from the population mean test score for the coffee population The population mean test scores for all three treatments are different. Calculate the degrees of freedom and the variances for the following ANOVA table: Source Ss df MS 25 ... MacBook Air 000 F9 F10 esc a00 F4 F6 FB F1 F2 F3 F5 F7 @ # $ % & * 3 4 7 8 9. * cO
Transcribed Image Text:Safari Edit View History Bookmarks Window Help イ令 File A ng.cengage.com * CENGAGE MINDTAP losie v Problem Set: Chapter 12 Introduction to Analysis of Variance A My Home 7. Hypothesis testing with ANOVA e Courses Opinions about whether caffeine enhances test performance differ. You design a study to test the impact of drinks with different caffeine contents on O Catalog and Study Tools students' test-taking abilities. You choose 21 students at random from your introductory psychology course to participate in your study. You randomly assign each student to one of three drinks, each with a dfferent caffeine concentration, such that there are seven students assigned to each drink. O Rental Options You then give each of them a plain capsule containing the precise quantity of caffeine that would be consumed in their designated drink and have them take an arithmetic test 15 minutes later. F college Success Tips The students receive the following arithmetic test scores: = Career Sucess Tips RECOMMENDED FOR YOU Coffee Espresso Water Caffeine Content (mg/ox) 13.4 51.3 78 92 83 EX- 142,493 88 87 83 G-1,723 72 80 76 N-21 Maintaining Social k-3 72 89 79 Connections 64 96 86 81 83 79 82 92 81 Help T.- 537 T,- 619 T.- S67 O Give Feedback Ss, - 381.43 Ss, - 185.71 Ss,- 66 M, - 76.7143 M,- 81.0000 M.- 88.4286 You plan to use an ANOVA to test the impact of drinks with different caffeine contents on students' test-taking abties, What is the null hypotheis? The population mean test scores for all three treatments are equal. The population mean test scores for all three treatments are not all equal The population mean test score for the water population is different from the population mean test score for the coffee population The population mean test scores for all three treatments are different. Calculate the degrees of freedom and the variances for the following ANOVA table: Source Ss df MS 25 ... MacBook Air 000 F9 F10 esc a00 F4 F6 FB F1 F2 F3 F5 F7 @ # $ % & * 3 4 7 8 9. * cO
Safari File Edit View History Bookmarks Window Help A ng.cengage.com * CENGAGE MINDTAP Problem Set: Chapter 12 Introduction to Analysis of Variance Source df MS Between 4. Within 633.14 Total 1,124.95 The formula for the F-ratio is: F- MSeween MS Using words (chosen from the dropdown menu), the formula for the F-ratio can be written as: F - Using the data from the ANOVA table alven, the F-ratio can be written as F- Thus: Use the Distributions tool to find the critical region for a0.01. F Distribution Numerator Degees of Freedom 26 Denominator Degrees of Freedom 2 6 25 MacBook Air 14 F7 D00 esc 000 FA F6 F8 F9 F1 F2 F3 F5
Transcribed Image Text:Safari File Edit View History Bookmarks Window Help A ng.cengage.com * CENGAGE MINDTAP Problem Set: Chapter 12 Introduction to Analysis of Variance Source df MS Between 4. Within 633.14 Total 1,124.95 The formula for the F-ratio is: F- MSeween MS Using words (chosen from the dropdown menu), the formula for the F-ratio can be written as: F - Using the data from the ANOVA table alven, the F-ratio can be written as F- Thus: Use the Distributions tool to find the critical region for a0.01. F Distribution Numerator Degees of Freedom 26 Denominator Degrees of Freedom 2 6 25 MacBook Air 14 F7 D00 esc 000 FA F6 F8 F9 F1 F2 F3 F5
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