QUESTION 27

1. If a 95% confidence interval for the difference in two independent means is (2.1 to 4.5), this indicates that we should not reject the null hypothesis, concluding there is no significant difference in the means, with respect to an =0.05 hypothesis test.True or False?

True

False

2 points

QUESTION 28

1. If we design a study to have no more than a 10% chance of a type 2 error, then the statistical power of the study equals 90%.True or False?

True

False

2 points

QUESTION 29

1. The probability of rejecting the null hypothesis when it is actually true is called the "type 1 error rate". True or False?

True

False