SMAT 130B-01 – CRN: 10227: What conditions are necessary in order to use the​ t-test for testing the difference between two population​ means?

Posted: November 30th, 2022

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Part 1

Choose the correct answer below.

A.

The population standard deviations are known. The samples are randomly selected and independent. The populations are normally distributed or each sample size is at least 30.

B.

The population standard deviations are unknown. The populations are normally distributed or each sample size is at least 30.

C.

The population standard deviations are unknown. The samples are randomly selected and independent.

D.

The population standard deviations are unknown. The samples are randomly selected and independent. The populations are normally distributed or each sample size is at least 30.