A researcher wants to carry out a hypothesis test involving the ...

[jrubin]

A researcher wants to carry out a hypothesis test involving the mean for a sample of size n = 15 . He does not know the true value of the population standard deviation, but is reasonably sure that the underlying population is approximately normally distributed. Should he use a z-test or a t-test in carrying out the analysis? Why?

Question 2

The ___________________ _ is appropriate for hypothesis tests in which the sample standard deviation(s) is used in estimating the value of the population standard deviation ().
 Fill in the blank(s) with correct word

[Jody Vaughn]

Answer to Question 1

t-test; He should use a t-test to carry out the analysis since the population standard deviation is unknown, but he is reasonably sure the population is approximately normally distributed.

Answer to Question 2

t-test

[jrubin]

Thanks for the timely response, appreciate it

[CAPTAINAMERICA]

Gracias!