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ABA airlines never likes to fly a plane with an empty seat. The flight is from ATL to St. Croix can hold 200 passengers. Past data has shown that 5% of passengers never show for a flight. As a result ABA likes to overbook its flights so that there are no empty seats. What is the largest number of passengers ABA should book so that there is at least a 95% chance that everyone who shows up will get on the plane? Assume that passengers are independent of each other and there is a 5% chance each passenger DOES NOT show up and a 95% chance each passenger DOES show up.
A manufacturer claims that the mean lifetime of its light bulbs is 55 months. The standard deviation of these lifetimes is 6 months. Twenty-two bulbs are selected at random, and their mean lifetime is found to be 56 months.
A community health association is interested in estimating the average number of maternity days women stay in the local hospital.
A random sample of 100 highway runs of the new model yields a sample mean of 32 miles per gallon. Give a 95% confidence interval for the population average.
A process follows the binomial distribution with n = 8 and p = .3. Find
a sample of 10 observations is selected from a normal population for which the population standard deviation is known
As the PMBOK and other resource materials state "communication is 80% of a PMs job". Why is communication so important in the Project Manager's role?
Suppose that 245 such companies are selected independently and at random. What is the probability that 191 companies in the sample electronically monitor their employees?
A railway company operates a number of different services. One of these connects two cities and the journey time is assumed to be normally distributed with a mean of 125 minutes and a standard deviation of 5 minutes.
the reliability of a computer system is often measured in terms of life-length of a specific hardware component. in
Leadership and management may be words that are used interchangeably, but they are two distinct roles in the work place.
If the part is defective, what is the probability it was produced by machine A?- If the part is good, what is the probability it was produced by machine B?
In 2001, an estimated 78% of executives believed that age bias was a serious problem. In a 2004, 82% of the executives surveyed considered age bias a serious problem.
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