A research scholar wants to know how many times per hour a certain strand of virus reproduces. The mean is found to be 12.9 reproductions and the population standard deviation is known to be 2.2. If a sample of 358 was used for the study, construct the 90% confidence interval for the true mean number of reproductions per hour for the virus. Round your answers to one decimal place.

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A research scholar wants to know how many times per hour a certain strand of virus reproduces. The mean is found to be 12.9 reproductions and the population standard deviation is known to be 2.2. If a sample of 358 was used for the study, construct the 90% confidence interval for the true mean number of reproductions per hour for the virus. Round your answers to one decimal place.

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