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In a study on caffeine and stress, college stu- dents indicated how many cups of coffee they drink per day and their stress level on a scale of 1 to 10. The data appear below. Number of Cups of Coffee Stress Level 3 2 Number of Cups of Coffee 4 Stress Level 3 9. 6. 4 2 1 10 3 Calculate a Pearson's r to determine the type and strength of the relationship between caffei and stress level. How much of the variability i stress scores is accounted for by the number of cuns of coffee consumed per day?

In a study on caffeine and stress, college stu- dents indicated how many cups of coffee they drink per day and their stress level on a scale of 1 to 10. The data appear below. Number of Cups of Coffee Stress Level 3 2 Number of Cups of Coffee 4 Stress Level 3 9. 6. 4 2 1 10 3 Calculate a Pearson's r to determine the type and strength of the relationship between caffei and stress level. How much of the variability i stress scores is accounted for by the number of cuns of coffee consumed per day?

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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All the subjects are ranked on both variables and then one determines the Σχ-ΣΧ(ΣΥ) ΣΧΥ- Σχε_(Σχ)? y2 (ΣΥ? Ex² = uc 101HIUla for p, is: Ior p, 1s: 6Σ d P.=1- %3D N(N-1) where: p, = Spearman rho %3D d'= difference in subject's rank on the two measures squared N= number of subjects in the sample 6= constant always employed in this calculation Formula (9.1) Spearman Rho Correlation Coefficient All the subjects are ranked on both yariables and then one determines u difference between the paired ranks of squared ovor
Transcribed Image Text:All the subjects are ranked on both variables and then one determines the Σχ-ΣΧ(ΣΥ) ΣΧΥ- Σχε_(Σχ)? y2 (ΣΥ? Ex² = uc 101HIUla for p, is: Ior p, 1s: 6Σ d P.=1- %3D N(N-1) where: p, = Spearman rho %3D d'= difference in subject's rank on the two measures squared N= number of subjects in the sample 6= constant always employed in this calculation Formula (9.1) Spearman Rho Correlation Coefficient All the subjects are ranked on both yariables and then one determines u difference between the paired ranks of squared ovor
4. In a study on caffeine and stress, college stu- dents indicated how many cups of coffee they drink per day and their stress level on a scale of 1 to 10. The data appear below. Number of Cups of Coffee Stress Level Stress Level Number of Cups of Coffee 10 Calculate a Pearson's r to determine the type and strength of the relationship between caffeine and stress level. How much of the variability in stress scores is accounted for by the number of cups of coffee consumed per day? 942 23 32 4651 73
Transcribed Image Text:4. In a study on caffeine and stress, college stu- dents indicated how many cups of coffee they drink per day and their stress level on a scale of 1 to 10. The data appear below. Number of Cups of Coffee Stress Level Stress Level Number of Cups of Coffee 10 Calculate a Pearson's r to determine the type and strength of the relationship between caffeine and stress level. How much of the variability in stress scores is accounted for by the number of cups of coffee consumed per day? 942 23 32 4651 73
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