The confidence interval for one sample selected from a population with a known variance is computed using a critical value for which type of test?
A) z test
B) t test
C) none
D) both A and B

Question

Quizplus · Accepted Answer

When the population variance is known and the sample size is large (n > 30), a z-test is appropriate. In this case, the confidence interval would be calculated using a critical value from the standard normal distribution.

The Confidence Interval for One Sample Selected from a Population