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Mathematics, 04.04.2020 15:02 ciaralamont2

2. A random sample of the costs of repair jobs produces a mean of $127.95 and a standard deviation of $24.03. If
the size of this sample is 40, which of the following is an approximate 90 percent confidence interval for the
average cost of a repair at this repair shop?

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2. A random sample of the costs of repair jobs produces a mean of $127.95 and a standard deviation o...

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