1) In a two-tailed hypothesis test, the test statistic is determined to be z = -2.5. The p-value for this test: Why?

a) is 0.0062.

b) is 0.0124.

c) is 0.4938.

d) cannot be determined, since the level of confidence is not given.

2. The table gives beverage preferences for random samples of teens and adults.

Teens Adults Total

We are asked to test for independence between age (ie adult and teen) and drink preference.

The expected number of adults who prefer coffee is:

a) 0.25

b) 0.33

c) 150

d) 200