As the degrees of freedom increase, the correspondence between ...

[joblessjake]

As the degrees of freedom increase, the correspondence between the t and z distributions _________.
 
  a. increases c. remains the same
  b. decreases d. cannot be determined

Question 2

In a correlated groups experiment, if we must estimate the population standard deviation to determine the significance of the sample results, the appropriate statistical test is _________.
 
  a. t test c. z test
  b. sign test d. none of these

[jennafosdick]

Answer to Question 1

A

Answer to Question 2

A