95 percent of the observations under the normal curve fall within ________ times the sample error.
A) + or - 1.64
B) + or - 1.96
C) + or - 2.58
D) + or - 95
E) + or - 1.95

Question

Quizplus · Accepted Answer

The 95 percent confidence interval corresponds to 1.96 standard deviations away from the mean, which is represented by option B. This means that 95 percent of the observations fall within +/- 1.96 times the standard error.

95 Percent of the Observations Under the Normal Curve Fall