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Jim McDonald, manager of the fast-food hamburger restaurant McBurger, realizes that providing fast service is a key to the success of the restaurant. Customers who have to wait very long are likely to go to one of the other fast-food restaurants in town next time. He estimates that each minute a customer has to wait in line before completing service costs him an average of 30 cents in lost future business. Therefore, he wants to be sure that enough cash registers always are open to keep waiting to a mini mum. Each cash register is operated by a part-time employee who obtains the food ordered by each customer and collects the payment. The total cost for each such employee is $9 per hour. During lunch time, customers arrive according to a Poisson process at a mean rate of 66 per hour. The time needed to serve a customer is estimated to have an exponential distribution with a mean of 2 minutes. Determine how many cash registers Jim should have open during lunch time to minimize his expected total cost per hour.
Note that under the exponential assumption, P(X>t) = exp(-t/theta). If t=5, use the result from (a) to find an approximate one-sided lower 95% confidence limit for theta.
a recent news report indicated that out of 105 people polled 65 men and 15 women had given the president a high
Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed.
Assume that the annual rate of return for a common biotechnology stock is normally distributed with a mean of 5.5% and a standard deviation of 6%.
question a population has a standard deviation of 50. a random sample of 100 items from this population is selected.
You have money in an account at 7% interest, compounded monthly. To the nearest year, how long will it take for your money to triple?
when taking an exam some students quickly answer all the questions they know how to do. if they go back and revise
Research the topic of Job Satisfaction and provide a 1 page write-up of the research highlighting where statistical analysis is being used and why it's used.
the breaking strength of a rivet has a mean value of 10050 psi and a standard deviation of 505 psi.a what is the
MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?
Sketch the distribution of sample means for sample of n = 25 scores from this population.
Assuming that the two events are independent , the probability that cost is kept within budget and the campaign sales is:
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