95 percent of the observations under the normal curve fall within ________ times the sample error.
A) + 1.64
B) + 1.96
C) + 2.58
D) + 0.95
E) + 1.95

Question

Quizplus · Accepted Answer

This is the well-known 95% confidence interval, which is commonly used in statistical analysis. The value of 1.96 is derived from the standard normal distribution and represents the number of standard errors the estimate is away from the true population parameter. Therefore, the correct answer is B, +1.96.

95 Percent of the Observations Under the Normal Curve Fall