Traditionally people start smoking at 19, with a standard deviation of 2.1. a survey of 40 smokers in 2015 was conducted and produced a sample mean is 18.1. i made all these numbers up.

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?