The z value associated with a two-sided 88% confidence interval is _______.
A)1.28
B)1.55
C)1.17
D)0.88
E)1.90

Question

Quizplus · Accepted Answer

The z value for a two-sided 88% confidence interval is found by first determining the alpha level (α), which is 1 - 0.88 = 0.12. Since it's two-sided, we divide this by 2, getting 0.06. Looking up 0.06 in the z-table (or using a calculator), we find the closest value corresponds to a z-score of approximately 1.55.

The Z Value Associated with a Two-Sided 88% Confidence Interval