For a two-tailed test at the 0.05 significance level, what is the rejection region when the population standard deviation is known?
A) Between $\pm$1.96
B) Between $\pm$1.65
C) Greater than +1.96 and less than -1.96
D) Greater than +1.65 and less than -1.65

Question

For a two-tailed test at the 0.05 significance level, what is the rejection region when the population standard deviation is known?
A) Between  $\pm$1.96
B) Between  $\pm$1.65
C) Greater than +1.96 and less than -1.96
D) Greater than +1.65 and less than -1.65

Quizplus · Accepted Answer

For a two-tailed test at the 0.05 significance level with a known population standard deviation, the rejection region is typically set at z-scores greater than +1.96 or less than -1.96. This corresponds to the critical values for a 95% confidence interval in a standard normal distribution, leaving 5% in the tails (2.5% in each tail).

For a Two-Tailed Test at the 0 ±\pm± 196 B) Between ±\pm±

For a Two-Tailed Test at the 0 $\pm$ 196
B) Between $\pm$