A. Using the following statistics to describe a distribution of data, what is the interquartile range? Minimum = 15 Q1 = 28 Median = 52 Q3 = 73 Maximum = 94

12.

AGES	FREQUENCY
40 UP TO 50	10
50 UP TO 60	28
60 UP TO 70	12

For the distribution of ages just shown, what is the relative class frequency for the lowest class?

14. What is the value of the Pearson coefficient of skewness for a distribution with a mean of 15, median of 11 and standard deviation of 5? +2.4 -1 -2.4 +1