# Question

In 2008, the murder rates (per 100,000 residents) for the 50 states and the District of Columbia (D.C.) had a mean of 5.39 and a standard deviation of 4.434 (Statistical Abstract of the United States).8

a. D.C. had a murder rate of 31.4. Find its z -score. If the distribution were roughly normal, would this be unusually high? Explain.

b. Based on the mean and standard deviation, do you think that the distribution of murder rates is approximately normal? Why or why not?

a. D.C. had a murder rate of 31.4. Find its z -score. If the distribution were roughly normal, would this be unusually high? Explain.

b. Based on the mean and standard deviation, do you think that the distribution of murder rates is approximately normal? Why or why not?

## Answer to relevant Questions

The table shows the probability distribution of the number of bases for a randomly selected time at bat for a San Francisco Giants player in 2010 (excluding times when the player got on base because of a walk or being hit by ...In Example 11 on ESP, John Doe had to predict which of five numbers was chosen in each of three trials. Doe did not actually have ESP. Explain why this experiment satisfies the three conditions for the binomial distribution ...Refer to the previous exercise. Over the course of a season, this player shoots 400 free throws. a. Find the mean and standard deviation of the probability distribution of the number of free throws he makes. b. By the normal ...Let X = the number of living grandparents that a randomly selected adult American has. According to recent General Social Surveys, its probability distribution is approximately P(0) = 0.71, P(1) = 0.15, P(2) = 0.09, P(3) = ...If z is the positive number such that the interval within z standard deviations of the mean contains 50% of a normal distribution, then a. Explain why this value of z is about 0.67. b. Explain why for any normal distribution ...Post your question

0