Physics, 31.07.2019 03:30 itsyaboiamo
The sound intensity of a certain type of food processor in normally distributed with standard deviation of 2.9 decibels. if the measurements of the sound intensity of a random sample of 9 such food processors showed a sample mean of 50.3 decibels, find a 95% confidence interval estimate of the (true, unknown) mean sound intensity of all food processors of this type
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