A company that makes cola drinks states that the mean caffeine content per12-ounce bottle of cola is

45 milligrams. You want to test this claim. During yourtests, you find that a random sample of thirty12-ounce bottles of cola has a mean caffeine content of 44.2 milligrams. Assume the population is normally distributed and the population standard deviation is 6.2 milligrams. At =0.10,

can you reject thecompany's claim? Complete parts(a) through(e).

(a)Identify H0 and Ha.

(b) Find the criticalvalue(s)

(c) Find the standardized test statistic.

Z= (Round to two decimal places as needed.)

(d) Decide whether to reject or fail to reject the null hypothesis.

A.

Since zin the rejection region,the null hypothesis.

B.

Since zin the rejection region,the null hypothesis.

C.

Since zin the rejection region,the null hypothesis.

D.

Since zin the rejection region,the null hypothesis.