identify the of measurement of each variables 6.Course Grades (A,B,C,D) 7.Commute times (in minutes) 8.Age (e.g. 17,18,23) 9.breast cancer rate 10.Test Scores ( standardized test) 11.Civil Status 12.Size of a t-shirt 13.Land area 14.Speed of a car 15.Test Scores (Percent Correct)​