If a researcher wishes to have a 95% confidence interval,he or she should use a z value of:
A)±95
B)95%
C)1)96
D)2)58
E)1)64

Question

Quizplus · Accepted Answer

For a 95% confidence interval, we use a level of significance of 0.05 (1-0.95). The z-value corresponding to a level of significance of 0.05 is 1.96, assuming a normal distribution. Therefore, the researcher should use a z-value of 1.96 to calculate a 95% confidence interval.

If a Researcher Wishes to Have a 95% Confidence Interval,he