Use the following information for questions:
Suppose that a confidence interval for a population proportion p is to be calculated. For each confidence level find the appropriate z* multiplier.
-The z* multiplier for a 60% confidence interval is
A) 0.84
B) 0.7995
C) 0.99
D) None of the above

Question

Use the following information for questions:
 Suppose that a confidence interval for a population proportion p is to be calculated. For each confidence level find the appropriate z* multiplier.
-The z* multiplier for a 60% confidence interval is
A) 0.84
B) 0.7995
C) 0.99
D) None of the above

Quizplus · Accepted Answer

For a 60% confidence interval, the z* value (or critical value) corresponds to the point in a standard normal distribution that leaves 60% in the middle and 20% in each tail (since 100% - 60% = 40%, and this remainder is split evenly between the two tails). The z* value that leaves 20% in the tail is approximately 0.84.

Use the Following Information for Questions