Question

the following table shows scores on a spelling test. which measure is most affected by the outlier?
spelling test scores
$19.50 $22.95 $24.50
$23.95 $20.50 $49.95

Explanation:

Step1: Recall measure - sensitivity to outliers

Mean is affected by outliers, while median and mode are less affected.

Step2: Analyze the data

The outlier is $49.95$ among the scores. Mean is the sum of all values divided by the number of values. An outlier can greatly change the sum and thus the mean.

Answer:

Mean