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What is the new mean for exam

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A group of 50 students took an exam where the mean was 80 and the standard deviation was 12. Another student took the exam at a later time and got a grade of 20.

a) What is the new mean for this exam when you include the 51st student? Answer: ________

b) Would the new standard deviation be the same, larger, or smaller than the original standard deviation of 12 when you added the score of 20? Explain

Reference no: EM132852721

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