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Sampling Distribution of Sample Mean

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The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.2g/mi and standard deviation 0.05g/mi. A company has 25 cars of this model in its fleet. What is the level L such that the probability that the average NOX level mean for the fleet is greater than L is only 0.01?

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The solution provides step by step method for the calculation of row score using the Z score. Formula for the calculation and Interpretations of the results are also included.

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