Statistics

Statistics Solutions

The mean for the number of weeks 15 New York Times hardcover fiction books spent on the bestseller list is 22 weeks. The standard deviation is 6.17 weeks. The mean for the number of weeks 15 New York Times hardcover nonfiction books spent on the list is 28 weeks. The standard deviation is 13.2 weeks. At an a = 0.10, can we conclude that there is a difference in the mean times for the number of weeks the books were on the bestseller lists?
What is the type of test to be used?
(a)z-test, right tailed
(b)t-test, right tailed
(c)z-test, left tailed
(d) t-test, two tailed
(e)t-test, left tailed
(f)z-test, two tailed