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please solve A random sample of 36 students from IIBF was taken and weekly study hours were recorded. The sample mean study hour was calculated

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A random sample of 36 students from IIBF was taken and "weekly study hours" were recorded. The sample mean study hour was calculated as 30 hours. Suppose that the population size is 1000 and normally distributed with a population standard derivation of 9. A confidence interval for the population mean was calculated as [27.78 32.22]. Find the confidence level of the interval

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