How many standard deviations is required for a 98% confidence level?
A) 2
B) 2.05
C) 2.17
D) 2.33
E) 2.58

Question

Quizplus · Accepted Answer

For a 98% confidence level, we need to find the z-score that corresponds to the area of 0.99 (since the confidence interval is centered around the mean). Using a standard normal distribution table or calculator, we find that the z-score is approximately 2.33. Therefore, Choice D is the correct answer.

How Many Standard Deviations Is Required for a 98% Confidence