The Tail Portion of a Normal Curve Is the Area

question 20

Multiple Choice

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

---

Definitions:

Measure Variability

The degree to which data points in a dataset differ from each other and from their average value.

Square Root

A value that, when multiplied by itself, gives the original number. It is often represented as \(\sqrt{x}\) for a number \(x\).

Ranges

The difference between the maximum and minimum values in a data set, indicating the spread of values.

Coefficient of Variation

A standardized measure of dispersion of a probability distribution or frequency distribution, calculated as the ratio of the standard deviation to the mean.