Question

A new espresso machine claims that it brews in 11.0 mg/ounce of caffeine in each cup of coffee. To test this claim, we measure 40 coffees and calculated a sample mean of of 11.32 mg/ounce, and a sample standard deviation of 1 mg/ounce. Perform a test at significance level α = 0.03 to test whether this machine is accurate or not.

Answer 1

The correct answer is 11.32

Explanation:

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