You collect a sample of n = 31 and want to know if this sample is significantly different from the population. If $\sigma$ is known and $\alpha$ = .05, what is the appropriate critical value?
A) ±1.645
B) ±1.960
C) ±2.042
D) none of these

Question

Quizplus · Accepted Answer

For a two-tailed test with a significance level of 0.05 and a known population standard deviation, the appropriate critical value from the standard normal distribution (Z-distribution) is ±1.960.

You Collect a Sample of N = 31 and Want σ\sigmaσ

You Collect a Sample of N = 31 and Want $\sigma$