The large sample z test for 1 - 2 can be used as long as at least ...

[cabate]

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.

[abctaiwan]

Answer to Question 1

2

Answer to Question 2

1

[cabate]

Excellent

[tandmlomax84]

Gracias!