Chapter 11

Question 1

What two conditions must be met for the f distribution

Answer 1

1. Must be normally distributed
2. Must be at least interval scale

Question 2

What are the three requirements/assumptions that have to be met for a two sampled test of means with unknown sigma’s

Answer 2

1. Sampled populations are approximately normally distributed
2. Sampled populations are independent
3. Standard deviations of the two populations are equal

Question 3

A two sample hypothesis test with known sigma’s uses what kind of distribution

Answer 3

z distribution

Question 4

What family of distributions is used to determine if two populations have equal variances

Answer 4

F distribution

Question 5

If population variances are unknown, what family of distribution is used and what needs to be done with to the sample variances

Answer 5

t-distribution, variances must be pooled

Question 6

When are test samples dependent

Answer 6

1. Before and after test
2. When multiple test are done on the same samples