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A sample take of 199 student from morning class

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January 1st, 2018

A sample take of 199 student from morning class and 127 student from evening class. On Exam 1, all those sampled in morning class got 71 while those sampled in the evening got average 68 with a variance of 150. If both samples were combined.What is the combined Exam 1 average?What is the combined Exam 1 median?What is the combined Exam 1 standard deviation?

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