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Assume that a class contains 20 students. If the probability of a student obtaining an "A" is 0.7, a "B" is 0.2 and a "C" is 0.1, answer the following:
(a) What is the probability that 2 students will obtain A's, 2 obtain B's, and 16 obtain C's?(b) What is this probability if we are given that at least two students receive C's?(c) If A has a grade value of 4, B has a grade value of 3 and C has a grade value of 1, what is the expected grade of the class? Which law of probability will you use to compute this?
Richard is one of test takers. Find out the number of questions he can expect to get right on test by random guessing.
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Assuming that the heights of college women are normally distributed with mean 62 inches and standard deviation 3.5 inches, what percentage of women are between 58.5 inches and 72.5 inches?
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What is the probability that between 90 and 100 employers provide a two-day paid Thanksgiving holiday? That is, what is the ?
What is the 99% confidence interval?
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Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
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