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a. Assuming that the sample consists of n = 16 individuals, use a = .05 to determine whether the treatment effect is significant and compute both Cohen’s d and r² to measure effect size. b. Assuming that the sample consists of n = 31 individuals, repeat the test and compute both measures of effect size.

a. Assuming that the sample consists of n = 16 individuals, use a = .05 to determine whether the treatment effect is significant and compute both Cohen’s d and r² to measure effect size. b. Assuming that the sample consists of n = 31 individuals, repeat the test and compute both measures of effect size.

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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4. To evaluate the effect of a treatment, a sample is obtained from a population with a mean of u = 20, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M=21.3 with a variance of s? = 9. a. Assuming that the sample consists of n= 16 individuals, use a = .05 to determine whether the treatment effect is significant and compute both Cohen's d and r² to measure effect size. b. Assuming that the sample consists of n = 31 individuals, repeat the test and compute both measures of effect size. c. Comparing your answers for parts a and b, how does the size of sample influence the outcome of a hypothesis test and measure of effect size?
Transcribed Image Text:4. To evaluate the effect of a treatment, a sample is obtained from a population with a mean of u = 20, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M=21.3 with a variance of s? = 9. a. Assuming that the sample consists of n= 16 individuals, use a = .05 to determine whether the treatment effect is significant and compute both Cohen's d and r² to measure effect size. b. Assuming that the sample consists of n = 31 individuals, repeat the test and compute both measures of effect size. c. Comparing your answers for parts a and b, how does the size of sample influence the outcome of a hypothesis test and measure of effect size?
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