An engineer was asked to determine whether the average air quality in a vehicle assembly plant was
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An engineer was asked to determine whether the average air quality in a vehicle assembly plant was within OSHA guidelines. The following air quality readings were collected:
81, 86, 80, 91, 83, 83, 96, 85, 89
(a) Determine the sample mean.
(b) Calculate the standard deviation.
(c) Determine the number of values and percent of values that fall within 1 standard deviation of the mean.
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