For a two-tailed test with a 0.05 significance level,where is the rejection region when n is large and the population standard deviation is known?
A)Between ±1.960
B)Between ±1.645
C)Greater than +1.960 and less than −1.960
D)Greater than +1.645 and less than −1.645

Question

Quizplus · Accepted Answer

For a two-tailed test with a 0.05 significance level, when the population standard deviation is known and the sample size is large, the z-scores that mark the rejection regions are ±1.960. This means any z-score greater than +1.960 or less than -1.960 falls into the rejection region.

For a Two-Tailed Test with a 0