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1. The mean number of errors per page made by a member of the word processing pool for a large company is thought to be 1.5 with the number of errors distributed according to a Poisson distribution. If three pages are examined, what is the probability that more than 3 errors will be observed?
2. Arrivals to a bank automated teller machine (ATM) are distributed according to a Poisson distribution with a mean equal to three per 15 minutes.
a. Determine the probability that in a given 15-minute segment no customers will arrive at the ATM.
b. What is the probability that fewer than four customers will arrive in a 30-minute segment?
3. Consider a situation in which a used-car lot contains five Fords, four General Motors (GM) cars, and five Toyotas. If five cars are selected at random to be placed on a special sale, what is the probability that three are Fords and two are GMs?
How much money would a Western household have to spend on groceries per year in order to be at the 99th percentile?
an instructor believes that 20 or less of the students who finish a statistics course get an a grade. a sample of 90
Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.
A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse?
What is the percentage of defective balls manufactured by the company? What did the answer indicate?
the probability that a randomly selected 2-year-old male feral cat will live to be 3 years old is 0.88493 a what is the
a market research company interviews a simple random sample of 3600 persons in a certain town and asks what they did
What sample size would be needed for an error of ± 1.5 with 98 percent confidence? (Data are from a project by MBA student Wendy Blomquist.)
if 22 tickets are sold and 2 prizes are to be awarded find the probablilty that one person will win two prizes if that
When 343 college students are randomly selected and surveyed it is found that 110 own a car. find a 99% confidence level for the true population of all college students who own a car.
Based on these results, does te diet appear to be effective? Does the diet appear to have practical significance?
A shoe salesman want to see if his female customers have a preference in the color of shoe purchased. What is the test value for the following data?
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