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Question: The grades on the midterm examination given in a large managerial statistics class are normally distributed with mean 75 and standard deviation 9. The instructor of this class wants to assign an A grade to the top 10% of the scores, a B grade to the next 10% of the scores, a C grade to the next 10% of the scores, a D grade to the next 10% of the scores, and an F grade to all scores below the 60th percentile of this distribution. For each possible letter grade, find the lowest acceptable score within the established range. For example, the lowest acceptable score for an A is the score at the 90th percentile of this normal distribution.
A 95% confidence interval from an SRS of 30 observations. (a) A 90% confidence interval based on n = 12 observations. S7.1
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towards the end of the semester some statistics students decides that it might be helpful to stude in groups for their
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The 1930s and the Great Depression: With the complete collapse of the American economy, the people of the United States explored many possible solutions and then settled on one. What are all of the options that were in play and where did the count..
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what is the probability that a binomial random variable x having parameters n 500 and p 0.025 takes a value greater
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A store has an average of 25 people arriving each minute to checkout and each person on the average require 4 minutes to be processed at the checkout. What is the minimum number of cashiers required?
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