# Question

In Exercise 9.64, you could reject the null hypothesis that the mean weights of soccer and baseball players were equal 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 90% interval, would it capture 0? Explain.

c. Now go back to Exercise 9.64. 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 90% interval, would it capture 0? Explain.

c. Now go back to Exercise 9.64. Find a 95% confidence interval for the difference between means, and explain what it shows.

## Answer to relevant Questions

The prices of a sample of books at University of California at Santa Barbara (UCSB) were obtained by statistics students Ricky Hernandez and Elizabeth Alamillo. Then the cost of books for the same subjects (at the same ...The birth weights of 35 babies whose mothers did not smoke and 22 babies whose mothers smoked were compared; weights were in grams. (Source: Smoking Mothers, Holcomb 2006, accessed via StatCrunch. Owner: kupresanin99) Test ...Compare the weekday and weekend/holiday hours of sleep. Each pair of numbers is from one randomly selected person. This is a different set of data from the one in the chapter. (Source: StatCrunch Survey: Responses to Sleep ...The number of hours per week of television viewing for random samples of fifth grade boys and fifth grade girls were obtained. Each student logged his or her hours for one Monday-through-Friday period. Assume that the ...Why do we calculate s by dividing by n – 1, rather than just n? The reason is that if we divide by n - 1, then s2 is an unbiased estimator of σ2, the population variance. We want to show that s2 is an unbiased estimator ...Post your question

0