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Mathematics, 25.04.2020 04:01, casianogabriel2004
The Weather Underground reported that the mean amount of summer rainfall for the northeastern US is 8.5 inches. Mr. Weatherman, a meteorologist does not believe that. He randomly selected 9 cities in the northeast and found the mean rainfall amount to be 7.5 inches with a standard deviation of 1.5 inches. Test the hypothesis at 1% significance level.
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