Question 7.1

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 7.1

7.1 One-bedroom rental apartment.

A large city newspaper contains several hundred advertisements for one-bedroom apartments. You choose 25 at random and calculate a mean monthly rent of $703 and a standard deviation of $115.

What is the standard error of the mean?
What are the degrees of freedom for a one-sample $t$ statistic?

7.1

(a) $S E_{\bar{X}} = 23$ . (b) $d f = 24$ .