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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Superior Gaming, a computer enhancement company, has three product lines: audio enhancers, video enhancers, and connection-speed accelerators.
A company desires to replace its current plant equipment with new equipment that costs $10,000,000. One possibility would be for the company to issue $10,000,000 of bonds and use the proceeds to purchase the equipment.
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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