A doctor claims that a particular treatment will cure patients in

8 days on average. A study of 33 patients showed a sample mean of 6.76 and a standard deviation of 0.3. What would be the test static in order to test the claim?

A company claims that on average, their product lasts at least 3 years. A study of 85 products showed a sample mean of 1.8 and a standard deviation of 0.23. What would be the test static in order to test the claim?

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