this needs to be done in excel!

1. Listed below are amounts of arsenic (g, or micrograms, per serving) in a simple random sample of servings of brown rice from California. Construct a 90% CI estimate of the mean amount of arsenic for all servings of brown rice from California. Assume that amounts of arsenic for all servings of brown rice from California are distributed normally. Don't forget to check the respective requirements. 5.4,5.6,8.4,7.3,4.5,7.5,1.5,5.5,9.1,8.7