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The average length of a hospital stay in general or community hospitals in the United States is 5.7 days. Assuming a population standard deviation of 2.5 days and a simple random sample of 50 patients, what is the probability that the average length of stay for this group of patients will be no more than 6.5 days?
If the sample size had been 8 patients instead of 50, what further assumption(s) would have been necessary in order to solve this problem?
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
If the order is filled by random selection from the 2000 computers just received, what is the probability that the shipment to the consulting firm will include no more than 2 defective computers?
Identical parts of which 10 are defective and 90 are non-defective. Three parts are selected without replacement. What is the probability that at least one part is defective?
for a two tailed hypothesis test of a difference of means with icircplusmn.05 and df30 we have the following critical
Currently, the company is ordering 500 units each time an order is placed. What is the total holding cost for the year using this policy?
would this prove that they are exceeding their goal, using = .025?
Problem: Bearings are manufactured at a rate of 1000 bearings per day. For a large of bearings, their diameter was normally distributed with a mean of µ = 2.505 in and standard deviation of σ = 0.008 in. The specification calls for an acceptable d..
In a large metropolitan area, past records revealed that 30 percent of all the high school graduates go to college. Each student's choice to go to college is independent. From 20 graduates selected at random, what is the probability that exactly 8 wi..
Suppose that during a basketball practice. Joe tries 3 shots from the free throw line; imagine further that he has a probability equal to 0.6 of making each shot and that the attempts are independent. Let 'X' be the number of baskets he makes in t..
The horizontal 30-N force acts on the handle of the wrench. Determine the moment of this force about point O. Specify the coordinate direction angles , , of the moment axis.
Ski resort profits $1,500,000 during a good winter with lots of snow. The resort has a loss of $500,000 otherwise. The resort's historical climate data suggests that the probability of a good winter with lots of snow during any given year is 40%.
suppose that 14 of all steel shafts produced by a certain process are nonconforming but can be reworked rather than
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