Complete parts A and B for full credit.

a) A department store accepts only its own credit card. Among 36 randomly selected cardholders, it was found that the mean amount owed was $175.37, while the standard deviation was $84.77. Using a significance level of 0.05, test the claim that the mean amount owed by all customers is greater than $150.00.

Be sure to identify:

Both H0 and H1.

The value of the test statistic Z. Alpha Value. Then use the P-value to decide whether to Reject H0 or Not.

b) A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a mean different from the 600 mg stated by the manufacturer. Using a significance level of 0.05, test this claim. The mean acetaminophen content for a random sample of 34tablets was 603.2 mg with a standard deviation of 6.4 mg.

Be sure to identify:

Both H0 and H1.

The value of the test statistic Z. Alpha Value. Then use the P-value to decide whether to Reject H0 or Not.