The Local Police, Using Radar, Checked the Speeds (In Mph)

Essay

The local police, using radar, checked the speeds (in mph) of 30 motorists on a rural road. The results are listedbelow. Construct a relative frequency ogive using six classes. $$\begin{array} { l l l l l l l l l l } 44 & 38 & 41 & 50 & 36 & 36 & 43 & 42 & 49 & 48 \\35 & 40 & 37 & 41 & 43 & 50 & 45 & 45 & 39 & 38 \\50 & 41 & 47 & 36 & 35 & 40 & 42 & 43 & 48 & 33\end{array}$$