The items below are based on the following scenario. A professor believes the students in a statistics class this term are more creative than most other students attending the universty. A previous study found that students as the university had a mean score of 35 on a standard creativity test, and the current class has a average score of 40 on this scale with an estimated population standard deviation of 7. The standard deviation of the distribution of means is 1.63. The effect size is: