Stats Exam 3

Two researchers (A and B) compute a one-sample t test. For both tests, the standard error is the same, but the mean difference between the sample and value stated in the null hypothesis is smaller for Researcher A. Which test is more likely to result in a decision to reject the null hypothesis?

Researcher B

A researcher reports that the mean time it takes to complete an experimental task is 1.4 +_ 8.0 (M+_SD)s. If the null hypothesis was the mean equals 1.0, then what is the effect size for this test using estimated Cohen's d?

d=0.05; small effect size

The ____________ is an inferential statistic used to determine the number of standard deviations in a t distribution that a sample mean deviates from the mean value or mean difference stated in the null hypothesis.

t statistic

As a requirement for the t test, researchers compute any type of t test with samples selected from populations in which ____________.

the population variance is unknown.

Computing a one-sample t test is appropriate when____________.

all of these