A company that makes cola drinks states that the mean caffeine content per 12-ou

Question

A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 45 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 46.2 milligrams with a standard deviation of 7.1 milligrams. At = 0.01, can you reject the company's claim? Complete parts (a) through (e). (a) Identify Ho and H. Choose the correct answer below. A. Ho: 46.2 Ha : 46.2 Ha : -45 Ho: 2 46.2 Ha:

Explanation / Answer

Degrees of freedom = n-1=30-1 = 29.

Ans: A. The critical values are +- 2.76   

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