Listed below are measured amounts of lead [in micrograms per cubic meter, or mu

Question

Listed below are measured amounts of lead [in micrograms per cubic meter, or mu g/m^3] in the ar. The EPA has established an quality standard for lead of 1 5 mu g/m^3. The measurements shown below were recorded at a building on different days. Use the given values to construct a 95% confidence inter estimate of the mean amount of lead in the air. Is there anything about this data set suggesting that the confidence interval might not be very good? What is the confidence interval for the population mean mu ? mu g/m3

Explanation / Answer

Using stat disk

Mean(Xbar) = 1.62333

Margin of error, E = 1.963208

CONFIDENCE INTERVEL=(Xbar-E, Xbar+E)

95% Confident the population mean is within the range:

-0.3398743 < mean <3.586541

( -0.340,3.587)

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