Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal...

Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution with a mean of 1.7 ppb and a standard deviation of 0.4 ppb. Suppose 14 cars are selected at random. What is the probability that the average emissions of the 14 cars is less than 1.5 ppb?

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orchestra answered 1 year ago

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