1.) Listed below are measured amounts of lead(in micrograms per cubicmeter, or g/m3) in the air. The EPA has established an air quality standard for lead of 1.5 g/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 verygood?

5.40 0.90 0.49 0.68 0.73 0.90

What is the condence interval for the population mean p? Duglm3