# Question

In Exercise 9.63 you could not reject the null hypothesis that the mean amount spent by men and the mean amount spent by women for clothing are the same, using a two-tailed test with a significance level of 0.05.

a. If you found a 95% confidence interval for the difference between means, would it capture 0? Explain.

b. If you found a 99% confidence interval, would it capture 0? Explain.

c. Now go back to Exercise 9.63. Find a 95% confidence interval for the difference between means, and explain what it shows.

a. If you found a 95% confidence interval for the difference between means, would it capture 0? Explain.

b. If you found a 99% confidence interval, would it capture 0? Explain.

c. Now go back to Exercise 9.63. Find a 95% confidence interval for the difference between means, and explain what it shows.

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