# In Exercise 9.63 you could not reject the null hypothesis that the mean amount spent by men

## Question:

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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**Related Book For**

## Introductory Statistics Exploring The World Through Data

**ISBN:** 9780321978271

2nd Edition

**Authors:** Robert Gould, Colleen Ryan