9) The Environmental Protection Agency is concerned about the levels of a toxic chemical in the milk of nursing mothers. It gathers the following data about the levels of this chemical, measured in parts per million, in a sample of 20 women: 16,0,0,2,3,6,8,2,5,0,12,10,5,7,2,3,8,17,19,1 Construct a 95% confidence interval for the level of the chemical in the milk of nursing mothers, to the nearest hundredth. 10) A student has heard a rumor that the answers to a teacher's multiple-choice tests are not randomly distributed She looks at some past tests, and comes up with the following distribution numbers: Choice A 27 B C D 12 31 24 Do a x2 hypothesis test, at the .01 significance level, to see if the rumor is right.