It is important that face masks used by firefighters be able to withstand high temperatures because firefighters commonly work in temperatures of 200500F. In a test of one type of mask, 11 of 55 masks had lenses pop out at 250. Construct a 90% CI for the true proportion of masks of this type whose lenses would pop out at 250

1/13/16 – 1/15/16 CHAPTER 1: WHERE DOES DATA COME FROM Individuals things, “subjects”, “participants” objects described by data building blocks of data doesn’t have to be living Variables any characteristic of the individual (have different values) 1. Categorical variable puts individuals into specific groups 2. Quantitative variable takes numeric values for arithmetic operations (add & average) Ex: age, weight, & height, test scores… WAYS TO COLLECT DATA 1. Observational study observes individuals measures variables DOES NOT GET INVOLVED WITH PARTICIPANTS