a researcher wonders if exposure to a certain chemical might change the proportion of obese mice in a population. in a typical population about 10% of mice are considered obese. he collects data from 317 mice exposed to the chemical and records whether or not each mouse is obese. he would like to know if, among mice exposed to the chemical, the proportion of obese mice is different than 10%. he calculates that the value of the chi-square statistic for this test is x2
