The tail portion of a normal curve is the area of the curve between
A) 2 and 3 standard deviations above the mean.
B) -2 and -3 standard deviations below the mean.
C) Both a and b
D) None of these

Question

Quizplus · Accepted Answer

The tail portion of a normal curve is the area in the tails of the distribution, which correspond to extreme values that are several standard deviations away from the mean. These tails can occur both above and below the mean, so they are located between 2 and 3 standard deviations above the mean (choice A) and between -2 and -3 standard deviations below the mean (choice B). Therefore, the best choice is C, which includes both options.

The Tail Portion of a Normal Curve Is the Area