A Consumer Protection Organization Claims That a New Car Model $\alpha = .05$

Essay

A consumer protection organization claims that a new car model gets less than 22 miles per gallon of gas. Ten cars are tested. The results are given below. Test the organization's claim. Use $\alpha = .05$ .
$\begin{array} { l l l l l l l l l l } 16.8 & 14.6 & 20.8 & 15.9 & 19 & 21.2 & 24.3 & 18.9 & 13.7 & 20 \end{array}$