This problem is from the following book: http://goo.gl/t9pfIj
We examine the weights for 50 strawberries to determine if the weights are approximately Normally distributed. First, we look at a histogram of the data and confirm it is unimodal and roughly symmetric. Next, we use the empirical rule (the 68-95-99.7 Rule) to see if about 68% of the weights fall within one standard deviation. Finally, we use a normal probability plot on a TI-84 Plus C Silver Edition.