q31 A confidence interval for the mean gives you a range of values that contains the exactpopulation mean.

Never true

Sometimes true

Always true

q33 Last year the average age of our clients was 30, and this year we believe it has decreased. We took a sample of 49 clients and found the average age of the sample was 29 and the standard deviation of the sample was 10. What is the test-statistic?

.10

-.10

-.70

None of the other choices is correct

.70