One hundred teachers attended a seminar on mathematical problem solving. The attitudes of a representative sample of 1212of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The 1212change scores are as follows:

44;99;11;22;00;55;2-2;11;11;66;55;2

A) Find the change score that is 2.22.2 standard deviations below the mean. Round your answer to two decimal places.