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Which of the following is NOT a statistical assumption of the independent means t-test?

The accuracy of an inference to a population based upon a sample depends upon the

If a research conducts a one-mean z-test at an alpha level of .05 and computes a p-value of 0.0236, she should

The researcher’s null hypothesis is that the test score means for boys and girls are equal. Based on the above results the researcher should:

How does sample size affect the width of a confidence interval?

A colleague has calculated a 95% confidence interval about the sample mean as: 16 < u < 25. What interpretation should your colleague make? 

A researcher has collected some data related to a new method of teaching reading. She conducted an independent means t-test and failed to reject the null hypothesis at alpha=.05. She calculated a sample effect size (d) of 0.90. What advice is the best regarding the results of this research?

Based on the above results, the appropriate p-value for the test that the population means are equal is:

Drs. Smith and Jones each collect identical data and each conduct an independent-means t-test. Dr. Smith uses an alpha level of 0.05, but Dr. Jones insists on an alpha of 0.001. Which of these researchers has greater power in her test of the null hypothesis?

Use the following information for items 37 and 38. Scenario: A researcher is comparing two independent groups of test scores. The following descriptive statistics are given when an independence t-test procedure is run. Assume α = .05. Question: What is the pooled standard deviation?