1. If sample sizes are large, the observed value of t is generally a. equal to t

ID: 3251426 • Letter: 1

Question

1. If sample sizes are large, the observed value of t is generally

a. equal to the variance

b. small

c. equal to the mean difference

d. large

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

3. 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

5. 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

If sample sizes are large, the observed value of t is generally

D.Large

Explanation:

the sample size n grows larger and larger, the results of a t-test and z-test become closer and closer

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