1. What is the mean change score? 2. What is the standard variation? 3. What is the median change score? 4. Find the change score that is 2.2 standard deviations below the mean. Round all answers two decimal places.

One hundred teachers attended a seminar on mathemat of a representative sample of 12 of the teachers were seminar. A positive number for change in attitude indicat math became more positive. The 12 change scores are a 3; 7; - 1; 2; 0; 5; -4; 1; -1; 6; 5; -2