Author Question: The large sample z test for 1 - 2 can be used as long as at least one of the two sample sizes, n1 ... (Read 74 times)

cabate · **on:** Jul 24, 2018

The large sample z test for 1 - 2 can be used as long as at least one of the two sample sizes, n1 and n2, is greater than or equal to 30.
1.True
2.False

Question 2

A survey was conducted on campus to learn about the average time that students spend in volunteer service per week. A random sample of 20 female college students and an independent random sample of 18 male college students were obtained and the number of volunteer hours per week was recorded. A 90 confidence interval for the difference in the population mean number of volunteer hours per week, F M is given by (0.4, 2.6).
Based on this interval, does there appear to be a difference in the number of volunteer hours per week between females and males, on average?
1.Yes, because 0 is not in the interval.
2.No, because 0 is not in the interval.