2. Which of the following provides the best point-estimate of the population var

ID: 3251448 • Letter: 2

Question

2. Which of the following provides the best point-estimate of the population variance?

a. The variance from the smaller of the two samples

b. The variance from the larger of the two samples

c. The pooled variance

d. The variance whose absolute value is larger

2. What is the advantage of a two-sample study over a one-sample study?

a. Two-sample studies usually cost less than one-sample studies.

b. Two-sample studies are less likely to cause ethical concerns.

c. Two-sample studies can test standard deviations in addition to means.

d. Two-sample studies help control the effects of simultaneous events.

4. One advantage of the two-sample study over the one-sample study is that it helps control for the effect of

a. disproportionate means

b. simultaneous events

c. multiple dependent variables

d. nonrandom sampling

4. In the two-sample test, the null hypothesis says that

a. the sample means are the same

b. the population means are the same

c. the samples are the same

d. the populations are the same

2. Which of the following provides the best point-estimate of the population variance?

Answer. The pooled variance

2. What is the advantage of a two-sample study over a one-sample study?

Answer. Two-sample studies help control the effects of simultaneous events.

4. One advantage of the two-sample study over the one-sample study is that it helps control for the effect of

Answer. simultaneous events

4. In the two-sample test, the null hypothesis says that

Answer. the population means are the same

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