Question

observe the box - and - whisker plot below. ages of retired people in florida. which of the following points is an outlier?

Explanation:

Step1: Recall outlier definition

Outliers in a box - and - whisker plot are points outside the range of $Q1 - 1.5\times IQR$ and $Q3+1.5\times IQR$, where $Q1$ is the first quartile, $Q3$ is the third quartile and $IQR = Q3 - Q1$. Visually, points far from the box and whiskers are outliers. Looking at the box - and - whisker plot, the main data range is from around 60 to 85.

Step2: Identify the outlier

Among the options 60, 64, 68 and 54, 54 is far from the main data range shown in the box - and - whisker plot.

Answer:

54