For Exercises 7.1 and 7.2, see page 360; for 7.3 and 7.4, see page 362; for 7.5 to 7.7, see page 365; for 7.8 and 7.9, see page 368; for 7.10 and 7.11, see page 371; and for 7.12 and 7.13, see page 372.

Question 7.2

7.2 Changing the sample size.

Refer to the previous exercise. Suppose that instead of an SRS of 25, you sampled 16 advertisements.

  1. Would you expect the standard error of the mean to be larger or smaller in this case? Explain your answer.
  2. State why you can’t be certain that the standard error for this new SRS will be larger or smaller.