What is the null hypothesis

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The owner of the store from Chapter 12, Exercise 1, wants to know if the mean age of all customers is 25 years old.

a) What is the null hypothesis?

b) Is the alternative one- or two-sided?

c) What is the value of the test statistic?

d) What is the P-value of the test statistic?

e) What do you conclude at a = 0.05?

f) Given the confidence interval you found in Chapter 12, Exercise 7, what might you have concluded? Explain.

Reference no: EM131008551

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