Confidence interval-mean of the population
A random sample of 81 students at a local university showed that they work an average of 60 hours per month with a standard deviation of 18 hours. Compute a 95% confidence interval for the mean of the population.
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After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation?
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a. Compute the standard error of the mean (in dollars). b. Compute the margin of error (in dollars) at 95% confidence.
Molina Medical Supply Company is trying to decide whether or not to continue distributing hospital supplies. The following information is available for Molina%u2019s business segments.
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