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Suppose that GMAT scores are normally distributed with a mean of 530 and a standard deviation of 100. A school only accepts top 15% student based on the test score. What minimal score will be needed to be accepted by the school? (Hint: Below what score do 85% of the scores lie or what is the 85th percentile?)
individuals filing federal income tax returns prior to march 31 received an average refund of 1056. consifer the
Service times are exponentially distributed and average 24 per hour. Customers that arrive when all seats are taken do not enter the diner. The probability that there are no customers in the diner is?
Consider a gambler who at each play of the game has probability of winning one unit and probability of loosing one unit. Assuming that the successive plays of the game are independent,
A large internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days.
a soft-drink machine is regulated so that it discharges an average of 200 milliliters per cup. if the amount of drink
The statewide incidence of gonorrhea is 50 per 100,000 over a 3 month period. Is the number of gonorrhea cases in this county unusual for this time period?
In doing so, you collect a random sample of 50 salespersons employed by his company, which is thought to be representative of sales staffs of competing organizations in the industry. The collected random sample of size 50 showed that only 18 were ..
Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
You are working on an analysis of your company's current cost structure reviewing the various fixed and variable costs within your firm.
Mazda 6s resulting from a 10-mph crash into a concrete wall, the research group tests six cars of this type and assesses the amount of damage. Describe the population and sample for this problem.
The following set of data represents the number of hospitals for selected states. Find the mean, median, mode, midrange, range, variance, and standard deviation for the data?
a study of drinking and driving has found that 40 of all fatal auto accidents are attributed to drunk drivers 2 of all
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