Answer Happy

A researcher collected data from 76 seventh-grade students in a rural Midwestern school. One variable of interest was each student's score on the Piers-Harris Children's Self-Concept Scale, a psychological test administered by the researcher. A histogram of those scores is given. 14 14 11 12 10 Number of Students 5 4 4 20 30 40 50 60 Self-Concept Score 70 80 Estimate the median of this distribution.
The weights of healthy adult male Labrador Retrievers are approximately Normally distributed with a mean of 77 pounds and a standard deviation of 6 pounds. Briefly interpret the standard deviation in the context of this problem