Identify the value of the standard deviation. Students whose weight is more than 2 standard deviations below the mean are considered underweight. How many of the students in Miss Suzy's class are considered underweight? What is the minimum weight, to the nearest pound, of a student whose weight is more than three standard deviations above the mean? If a histogram is constructed to represent the frequency distribution of the weights of Miss Suzy's students using intervals of 5 pounds per interval ranging from 30 to 70 pounds, how many nonzero bars would the graph have? If a histogram is constructed to represent the frequency distribution of the weights of Miss Suzy's students using intervals of 5 pounds per interval ranging from 30 to 70 pounds, for which interval is the frequency distribution the greatest?