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New Process, Inc., a large mail-order supplier of women's fashions, advertises same-day service on every order. Currently the movement of orders hasn't gone as planned, and there were large number of complaints. Bud Owens, director of customer service, has completely redone method of order handling. Goal is to have fewer than five unfilled orders on hand at end of 95 percent of working days. Frequent checks of unfilled orders at end of day reveal that distribution of unfilled orders follows Poisson distribution with mean of two orders.
a. Has New Process, Inc., lived up to its internal goal? Explain evidence.
b. Sketch the histogram representing Poisson probability distribution of unfilled orders.
The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows Poisson distribution with a mean of 9 tickets per day.
For the set of data below construct a grouped frequency distribution that as well contains the real limits of each interval, midpoint of each interval, the cumulative frequency,
Assume that the process is in control and that the population of all jar fills is normally distributed.
Assume that female students' heights are normally distributed with a mean given by µ = 67.2 in. and a standard deviation given by σ = 3.6 in.
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
You are assigned to be part of a team of three analysts of a global management consulting company where of the entire work force of analysts. 55% have had no experience in telecommunications
A company sells two products (Product 1 and Product 2) that tend to be substitutes for each other. That is, if a customer buys Product 1, she tends to not buy Product 2, and vice versa.
The intelligence Quotient test scores normally distributed with a mean of 100 and a standard deviation of 15.
Suppose these data represent whole population. Determine the population mean and population standard deviation.
Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent.
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
A 15-minute Oil and Lube service claims that their average service time is no more than 15 minutes. A random sample of 35 service times was collected, and the sample mean was found to be 16.2 minutes, with a sample standard deviation of 3.5 minute..
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