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A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distributed with a mean of 460 and standard deviation of 80. The top 2.5 percent of the applicants would have a score of at least (choose the nearest integer)
Answer Choices:a. 606b. 617c. 600d. 646
An experiment consists of making 80 telephone calls in order to sell a particular insurance policy.
A large university says the mean number of classroom hours per week for full-time faculty is more than 9. A random sample of the number of classroom hours for full-time faculty for one week is listed.
The International Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
Find the probability that both light bulbs failed the test. Find the probability that both light bulbs passed the test. find the probability that at least one light bulb failed the test.
Construct a 95 percent confidence interval for the difference in proportions for the two populations represented by these samples.
In a series of tests, the piece was let operate till failure, repaired immediately, and let operate till next failure and so on for 3 months. The total number failures observed were 3.
Assuming that n = 6 for both samples, calculate each of the sample variances, then calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
When a fisherman catches a fish, it is a young one with a probability of 0.23 and is returned to the water. On the other hand, an adult fish is kept to be eaten later.
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
Assume there are 18 homes in the Quail Creek area and 9 of them have a security system. Five homes are selected at random: what is the probability all five of the selected homes have a security system?
A television station estimates that 50% of college students watch the super bowl. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch the game?
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