Suppose the coffee industry claimed that the average adult drinks 1.7 cups of coffee per day. to test this claim, a random sample of 40 adults was selected, and their average coffee consumption was found to be 1.85 cups per day. assume the standard deviation of daily coffee consumption per day is 0.6 cups. using alphaequals0.05, complete parts a and b below.
a. is the coffee industry's claim supported by this sample?
determine the null and alternative hypotheses.
upper h0:
upper h1:
the z-test statistic is
(round to two decimal places as needed.)
the critical z-score(s) is(are)
(round to two decimal places as needed. use a comma to separate answers as needed.)
b. determine the p-value for this test.
the p-value is
(round to three decimal places as needed.)