Answer:
20.14
Explanation:
The mean can be calculated as the sum of all the values divided by the total number of values. So:
[tex]\begin{gathered} \operatorname{mean}=\frac{21+15+25+22+18+23+17}{7} \\ \operatorname{mean}=\frac{141}{7} \\ \text{mean}=20.14 \end{gathered}[/tex]Therefore, the answer is 20.14
