Question: Basic Computation: Testing m, s Unknown A random sample of 25 values is drawn from a mound-shaped and symmetrical distribution. The sample mean is 10

Basic Computation: Testing m, s Unknown A random sample of 25 values is drawn from a mound-shaped and symmetrical distribution. The sample mean is 10 and the sample standard deviation is 2.

Use a level of signifi cance of 0.05 to conduct a two-tailed test of the claim that the population mean is 9.5.

(a) Check Requirements Is it appropriate to use a Student’s t distribution?

Explain. How many degrees of freedom do we use?

(b) What are the hypotheses?

(c) Compute the sample test statistic t.

(d) Estimate the P-value for the test.

(e) Do we reject or fail to reject H0?

(f) Interpret the results.

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