Example Exercise: 2.27 (OpenIntro Statistics) or 2.31 (Advanced High School Statistics)
Автор: OpenIntroOrg
Загружено: 2017-07-03
Просмотров: 9028
Описание:
Slides are available at:
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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 74 points with a standard deviation of 8.9 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 score?
(b) What is the new average?
(c) Does the new student’s score increase or decrease the standard deviation of the scores?
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