The Frequency Table Below Shows the Amount of Weight Loss

Essay

The frequency table below shows the amount of weight loss during the first month of a diet program for a group of men. Constructing a frequency polygon. Applying a loose interpretation of the requirements for a normal distribution, do the pounds of weight loss appear to be normally distributed?
Why or why not? $$\begin{array} { c | c } \text { Weight (lb) } & \text { Frequency } \\\hline 5 - 7 & 2 \\8 - 10 & 9 \\11 - 13 & 18 \\14 - 16 & 13 \\17 - 19 & 4 \\20 - 22 & 1\end{array}$$