A psychology tutor claims that the average test scores of students who attend his tutoring program is 96. You decided to collect scores from 20 of his students to check whether the sample score deviates from the average he claims. The mean test score of the students was 93, and the standard deviation was 4.5. Given this scenario: 6. Calculate the standard error of the mean (show your work). a. What is the square root of the N? b. What is the standard error of the mean