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26 May, 17:58

Here is a list of spelling-test results. Calculate the mean. 14,19,19,20,16,18,15,17,12

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  1. 26 May, 18:09
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    To find the mean (average), we first need to add up all the test scores (14 + 19 + 19 + 20 + 16 + 18 + 15 + 17 + 12 = 150). Then, we need to divide that number (150) by the number of numbers in the data set (9 in this case). So the mean of these test scores is about 16.6666666667.
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