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Mathematics, 14.01.2020 04:31 madelyngv97

Auto emissions oxides of nitrogen (called nox for short) emitted by cars and trucks are important contributors to air pollution. the amount of nox emitted by a particular model varies from vehicle to vehicle. for one light-truck model, nox emissions vary with mean μ = 1.8 grams per mile and standard deviation σ = 0.4 gram per mile. you test an srs of 50 of these trucks. the sample mean nox level will vary if you take repeated samples.

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