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Many college graduates who are employed fulltime have longer than 40hour work weeks. Suppose that we wish to estimate the mean number of hours, 11,
Many college graduates who are employed fulltime have longer than 40hour work weeks. Suppose that we wish to estimate the mean number of hours, 11, worked per week by college graduates employed fulltime. We'll choose a random sample of college graduates employed fulltime and use the mean of this sample to estimate 11. Assuming that the standard deviation of the number of hours worked by college graduates is 6.00 hours per week, what is the minimum sample size needed in order for us to be 95% confident that our estimate is within 1.3 hours per week of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satises the requirements). (If necessary, consult a list of formulas.) l] x53
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