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Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 25purchasers.A) What are the mean value and standard deviation of the number who want a new copy of the book?b) what is the probability that the number who want new copies is more than two standard deviations away from the mean value?c) The bookstore has 15 new...
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Human Resource Consulting (HRC) is surveying a sample of 66 firms in order to study health care costs for a client. One of the items being tracked is the annualdeductible that employees must pay. The state Bureau of Labor reports the mean of this distribution is $498 with a standard deviation of $85.(a) Compute the standard error of the sample mean for HRC. (Round your answer to 2 decimal places.)Standard error(b) What is the chance HRC finds a sample mean...
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Suppose 10 gonorrhea cases are reported over a 3-month period among 10,000 people living in an urban county. The statewide incidence of gonorrhea is 50 per 100,000over a 3-month period. Is the number of gonorrhea cases in this county unusual for this time period

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