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Question: in one of classes of professor c there are 25...

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In one of classes of Professor C, there are 25 students, one test scores are listed below 77 75 53 79 87 63 71 79 82 76 14 72 71 56 61 77 79 63 79 67 52 78 77 54 64 a) Find the mean (that is the test average). Write down the formula first. 2. b) Find the median, explain the meaning of the result c) Find the sample variance (write the expression in detail and you may use calculator)wddh monbe d) Find the sample standard deviation. Write down the formula you used and show your work.
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