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A sample of 64 observations is taken from a normal population known to have a standard...

A sample of 64 observations is taken from a normal population known to have a standard deviation of 13.7. The sample mean is 47.9. Calculate the test statistic to evaluate the hypothesis µ=46. Enter your answer to 2 decimal places.

A sample of 20 observations is taken from a normal population known to have a standard deviation of 17.3. The sample mean is 47.2. Calculate the test statistic to evaluate the hypothesis µ≤48. Enter your answer to 2 decimal places.

A sample of 20 observations is taken from a normal population known to have a standard deviation of 17.3. The sample mean is 47.2. Calculate the test statistic to evaluate the hypothesis µ≤48. Enter your answer to 2 decimal places.

Given the following null hypothesis H0: µ≤24.

A sample of 7 observations is taken from a normal population. The sample mean is 17.4 and the standard deviation  7.12. Calculate the test statistic to evaluate the hypothesis. Enter your answer to 2 decimal places.

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