Question

1. What is a characteristic of the repeated-measure design?

A. The test requires a larger sample size compared to a between-subjects design.

B. More than one measure is taken from each subject.

C. There are usually two groups of subjects to be compared.

D. The appropriate hypothesis test is typically independent-samples t-test.

2. Which is the best way to reduce the variance in the distribution of means (also called sampling distribution) when conducting a t test?

A. Ensuring that the two samples have the same variance.

B. Measuring the true population variances.

C. Increasing sample size.

D.Raising the alpha level for hypothesis testing.

Answer 1

(1) right choice is B. More than one measure is taken from each subject.

Repeated measures design is a research design that involves multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods

(2)right choice is C. Increasing sample size.

variance in the distribution of means=²/N and its estimate will be s²/n. so larger the sample size n the smaller is the variance of the means.

where s is the sample standard deviation and is the population standard deviation. so larger the