Listed below are amounts of arsenic (g, or micrograms, per serving) in samples of brown rice from

Listed below are amounts of arsenic (μg, or micrograms, per serving) in samples of brown rice from California (based on data from the Food and Drug Administration). Use a 90% confidence level. The Food and Drug Administration also measured amounts of arsenic in samples of brown rice from Arkansas. Can the confidence interval be used to describe arsenic levels in Arkansas?
5.4 5.6 8.4 7.3 4.5 7.5 1.5 5.5 9.1 8.7
Construct the confidence interval estimate of the mean.