In a two-sample test of means for independent samples, the equal sign always appears in

A. The null hypothesis.

B. The alternate hypothesis.

C. The upper tail of the test statistic.

D. None of the above.

In a two-sample test of means for independent samples, we use the z distribution when

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. n and n(1-) are both greater than 5.

Which of the following is a requirement for a test of proportions.

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. n and n(1-) are both greater than 5.

A. The null hypothesis.

B. The alternate hypothesis.

C. The upper tail of the test statistic.

D. None of the above.

In a two-sample test of means for independent samples, we use the z distribution when

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. n and n(1-) are both greater than 5.

Which of the following is a requirement for a test of proportions.

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. n and n(1-) are both greater than 5.

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