First- period test scores	75.7	11.93	20	78.5	72	82.5	48	94
Third- period test scores	81.8	9.6	29	85	74	89	57	96

B. Which class had the better overall performance? Justify your answer.(12 points)

C. The first-period class has a standard deviation of 11.93. Explain how this value summarizes variability in this class.(4 points)

2. The stemplot below shows the weights of 30 male high school students from Small Rock High School.

A. Using knowledge of statistics, describe the distribution. Include statistics and discussion of shape, center, and spread.(20 points)

B. Would it be reasonable to use this information to generalize about the distribution of weights for the entire population of high school boys? Why or why not?