22. In 1992, the murder rates (per 100,000 residents) for 74 major US. citics had a can of 20.8 and a standard deviation of 14.6 (Statistical Abstract of the United States. 1994)

a) Could the distribution of murder rates be well approximated by a normal distribution? Why or why not?

b) One of these cities, Washington, D.C. had a murder rate of 75.2. Find its z-score. If the distribution were roughly normally distributed. would this be an unusually high value? Why?

c) What is the murder rate of a city that has a z-score of 0.0?