Chapter 10, Problem 3P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

If other factors are held constant, explain how each of the following influences the value of the independent- measures *t* statistic and the likelihood of rejecting the full hypothesis:

a. An increase in the mean difference between the samples.

b. An increase in the number of scores in each sample.

c. An increase in the variance for each sample.

**a.**

To determine

**To Describe:** How the t-statistics, likelihood of rejecting null and measures of effect size affected when mean difference between the samples is increased.

Explanation

**Justification:**

We know that variance influences the magnitude of the estimated standard error in the denominator of the t-statistics as:

**b.**

To determine

**To Describe:** How the t-statistics and the likelihood of rejecting null affected when sample size is increased.

**c.**

To determine

**To Describe:** How the t-statistics and the likelihood of rejecting null affected when variance is increased.

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