A national restaurant chain wishes to test whether the mean amount of time a table is occupied by one party who begin the meal after 6:00 pm differs from 83 minutes, the mean three years ago. The times of 50 dinner parties will be measured. The setup of the null and alternative hypotheses for the relevant test of hypotheses is

Group of answer choices

H_0:z=83 versus H_a:z

H_0:?=83 versus H_a:?

H_0:x=83 versus H_a:x

H_0:?=83 versus H_a:??83

H_0:?=83 versus H_a:?>83

An analyst wishes to test whether the proportionof purchases of brand new merchandise bought online that is returned to the retailer is greater than the proportionof merchandise bought at brick and mortar stores that is returned. Assuming that the sample sizes are sufficiently large, the setup of the null and alternative hypotheses for this test must be:

To relate the caloriesxand milligrams of sodiumyin a single serving of frankfurter meat a dietitian analyzed 25 servings and computed:

90 ? x ? 230280 ? y ? 740= 2.98x + 52.48

r= 0.911r2= 0.830

For each additional calorie, on average the sodium content

Group of answer choices

increases by about 0.83 mg

increases by about 52.5 mg

increases by about 2.98 mg

increases by about 0.91 mg

changes be an indeterminate amount

An analyst wishes to test whether the proportion of purchases of brand new merchandise bought online that is returned to the retailer is greater than the proportion of merchandise bought at brick and mortar stores that is returned. Assuming that the sample sizes are sufficiently large, the setup of the null and alternative hypotheses for this test must be: a. Ho: P1 - P2 = 0 vs. Ha: P1 - P2 0 C. Ho: P1 - P2 = 0 vs. Ha: P1 - P2 0 e. Ho: Ma = 0 vs. Ha: Ha > 0 OC OD O B OE OA