Question

a. this statement is false. a true statement is an outlier is any number above 2q3 or below 2q1.
b. this statement is false. a true statement is an outlier is any number above q1 - 1.5(iqr) or below q3 + 1.5(iqr).
c. this statement is false. a true statement is an outlier is any number above q3 + 1.5(iqr) or below q1 - 1.5(iqr) are considered outliers.
d. this statement is true

Explanation:

Step1: Recall outlier definition

The commonly - used rule for identifying outliers is that an outlier is any number above $Q_3 + 1.5(IQR)$ or below $Q_1-1.5(IQR)$, where $IQR = Q_3 - Q_1$, $Q_1$ is the first quartile and $Q_3$ is the third quartile.

Answer:

C. This statement is false. A true statement is "An outlier is any number above $Q_3 + 1.5(IQR)$ or below $Q_1 - 1.5(IQR)$ are considered outliers."