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A random sample of 13 hotels in a city had an average nighty room rate of $172.10 with a sample standard deviation of $23.90.
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MAAN Given i a random sample of 13 hotels in a city average room nightly rate of with $142.10 Standard deviation of $ 23.90 .99.4. confidence interval for the population mean = ã + ME = 172.10 + 20.22 = 172.10 – 20.22 172.10 + 20:22 = (151.88, 192.32

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