On a normal curve,95 percent of all the cases would be found between which two SDs?
A) 0 and +3
B) -1 and +1
C) -2 and +2
D) -3 and +3

Question

Quizplus · Accepted Answer

In a normal distribution, 95% of the data lies within two standard deviations of the mean. Therefore, the correct choice is C) -2 and +2 as it covers this range. Option A covers only half of this range, while option B covers less than 70% of the data, and option D covers more than 99% of the data.

On a Normal Curve,95 Percent of All the Cases Would