(10) 2. The average score on an exam is 78. A test is given to 40 students and the average on the exam was 82 with a standard deviation of 14. a) At the .01 level did the students do better than expected? (p = .039) b) How do you explain the 4 point increase? C) Interpret the p-value: D) What is the only type of error that could have occurred