For the interval estimation of ( when ( is known and the sample is large, the proper distribution to use is
A.	the normal distribution
B.	the t distribution with n degrees of freedom
C.	the t distribution with n + 1 degrees of freedom
D.	the t distribution with n + 2 degrees of freedom
Answer:A
For the interval estimation of ( when ( is known and the sample is large, the proper distribution to use is
A.	the normal distribution B.	the t distribution with n degrees of freedom C.	the t distribution with n + 1 degrees of freedom D.	the t distribution with n + 2 degrees of freedom