Question: Monitoring lead in air: Listed below are measured amounts of lead in micrograms per cubic meter in the air. The environmental protection agency has established an air quality for lead of 1.5 micrograms per cubic meter. The measurements shown below were recorded at a certain location on different days. Use the given values to construct a 95% confidence 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? Explain

5.40 1.10 0.42 0.73 0.48 1.10