I am trying to help my son with homework and I really need help understanding this one please. It is question 2

Respectfully,

Tiffany

5:23 AM Wed Apr 26 57% schoology.idiglearning.org a 50 55 60 65 70 75 80 85 90 95 100 Test Score Find the range and interquartile range of the test scores. The distribution of the data set appears to be After finding the range and the interquartile range of the test scores the distribution of the data set appears to be normal. 0/1 Question 2 The amount of time engineering majors spend studying each day is normally distributed with a mean of 210 minutes and a standard deviation of 30 minutes. Approximately of the engineering students spend between 150 and 270 minutes studying each day. a. 50% X b. 68% c. 95% d. 99% 0/1 Question 3 The histogram shows the combined fuel economy (city and highway) for the 2012 General Motors vehicle product line