The critical value for an 84% confidence interval for the proportion is ---------.
A)± 1.41
B)± 2.65
C)± 1.00
D)± 1.96

Question

Quizplus · Accepted Answer

The critical value for an 84% confidence interval can be found using the Z-distribution table. For an 84% confidence level, the tails (both sides combined) have 16% of the area (100% - 84%), leaving 8% in each tail. The Z-score that corresponds to an area of 0.08 in the upper tail is approximately ±1.41.

The Critical Value for an 84% Confidence Interval for the Proportion