Algebra-1

Question Analysis
This question assesses the student's understanding of how to calculate the range of a data set. The range is a measure of dispersion that shows the spread of the data.

Key Concept Explanation
The range is the difference between the maximum and minimum values in the data set. It provides a simple indication of the total spread of the data.

Step-by-step Solution
1. Identify the maximum value in the data set: 21.
2. Identify the minimum...