Question 17 The following table summarizes the marital status and level of education for 500 people attending a financial workshop. One person is selected at random to receive a free software package. What percentage of single people have a college degree (CD)? 30% 34% 40% None of the others 33% Question 18 MARITAL STATUS Single (S) Married (M) Some College (SC) Divorced (D) TOTAL Marital Status vs Level of Education LEVEL OF EDUCATION College Degree (CD) 60 8 8 90 50 170 200 Customers arrive at a rate of 8 people per hour to a bank. Assume that the number of customers arriving occur at random but with a constant average of arrivals per hour. What is the probability that exactly 7 customers arrive in the next hour? 0.056 O 0.820 0.140 0.45 0.243 Question 19 Graduate Degree (GD) TOTAL 40 150 70 250 20 100 130 500 Based on historical data, customers arrive at a rate of 24 people per 8 hour work day to a Wells Fargo bank in Denton. Assume that the number of customers arriving can be described using the Poisson distribution. What is the probability that at most 6 customers arrive in the next hour? O 0.232 0.260 0.768 5 pts 5 pts 5 pts Question 20 Customers arrive at a rate of 24 people in an average 8 hour workday. Assume that the number of customers arriving can be described using the Poisson distribution. What is the probability that at least 4 customers arrive in the next hour? 0.353 0.18 0.81 0.17 Question 21 Customers arrive at a rate of 24 people per hour to a bank. Assume that the number of customers arriving can be described using the Poisson distribution. What is the mean and standard deviation of this Poisson distribution, respectively? 24 and 24 O24 and 0.042 0.042 and 0.042 24 and 4.9 4.9 and 24 Question 22 A factory produces car tires. The number of miles each tire lasts before it completely wares out follows a normal distribution with mean = 50,000 miles and standard deviation = 8,000 miles. What is the z-score for x = 48,000? 0 -0.25 O-1 -0.5 0 O 1 5 pts 5 pts 5 pts