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graph the confidence interval and interpret the results 7. Hotel rooms - A random sample of 30 standard hotel rooms in the Philadelphia, PA area

graph the confidence interval and interpret the results

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7. Hotel rooms - A random sample of 30 standard hotel rooms in the Philadelphia, PA area has a mean nightly cost of $165.00 and a sample standard deviation of $42.50. Construct a 90% confidence interval for the population mean cost and also for both standard deviation and variance of the population. Use the given information to also find o and o

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