A random sample of 15 of the 78 competitors at a middle school gymnastics competition are asked
their height
The data set lists the heights in inches 55, 57, 57, 58, 59, 59, 59, 59, 59, 61, 62, 62, 63, 64, 66
a. What is the mean height of the sample?
Please include your dimensions with the numerical answer.