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Mathematics, 17.09.2019 04:00 nanyckhadiarracom

In a class of 25 students, 24 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 24 exams and found an average score of 76 points with a standard deviation of 8.5 points. the student who took the make-up the following day scored 66 points on the exam.
a) does the new student's score increase or decrease the average?
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?

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