16. When n is small (less than 30), how does the shape of the t distribution compare to the normal distribution? a. It is almost perfectly normal. It is flatter and more spread out than the normal b....

Extracted text: 16. When n is small (less than 30), how does the shape of the t distribution compare to the normal distribution? a. It is almost perfectly normal. It is flatter and more spread out than the normal b. distribution. It is taller and narrower than the normal C. distribution. There is no consistent relationship between the t d. distribution and the normal distribution.


Extracted text: 15. A researcher conducts a hypothesis test using a sample of n = 20 from an unknown population. What is the df value for the t statistic? а. 19 b. 20 С. 21 Cannot be determined from the information d. given