V. Yondu requires all of 12 of his crew to be loyal, or else he will be killed and replaced as captain. Each of his crew (independently) has a 15% chance of betraying him. What is the probability (to four places after the decimal) that Yondu will remain captain

The measure of center is going to be mean and the spread is going to be standard deviation. The shape is going to be symmetric. Here's why: 

There are no outliers in the data. We can infer that by simply looking at the data within each inch range. Because there are no outliers, that means the data is symmetric. Because the data is symmetric (or nearly symmetric) we always use mean and the standard deviation as a measure of spread and center.