What percentage of the barometers

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Researchers for a manufacturer of barometers? (devices to measure atmospheric? pressure) read each of 50 barometers at the same time of day. The mean of the readings is 30.2?(inches of? mercury) with a standard deviation of 0.24 ?inch, and the readings appear to be normally distributed.

What percentage of the barometers read over 30.8?

What percentage of the barometers read less than 29.6?

The company decides to reject barometers that read more than 2 standard deviations above or below the mean. What is the critical reading below which barometers will be? rejected?

What is the critical reading above which barometers will be? rejected?

What would you take as the actual atmospheric pressure at the time the barometers were? read?

Reference no: EM132381905

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