1.44 Make-up exam: In a class of 23 students, 22 of them took an exam in class and 1 student took a make-up exam the following day. The professor graded the first batch of 22 exams and found an average score of 83 points with a standard deviation of 6.4 points. The student who took the make-up the following day scored 64 points on the exam.

a) Does the new student's score increase or decrease the average?

• Decreases
• Increases

b) The new average is: _________ (round to two decimal places) c) Does the new student's score increase or decrease the standard deviation of the scores?

• Increases
• Decreases