Listed below are measured amounts of lead (in micrograms per cubic meter, or µg/m³) in the air. The EPA has established an air quality standard for lead of 1.5 µg/m³. The measurements shown below were recorded at a building on different days. Use the given values to construct a 95% confidence interval 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? 5.40 1.10 0.43 0.79 0.76 0.90 Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table.

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A:

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