1. 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.