disney5
disney5
29-09-2017
Mathematics
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Stem leaf plot - answer to question 1
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3mar
3mar
29-09-2017
mean is the average of the records, i.e. add all up and divide by the number of them.
mean = (40 + 54 + 56 + 59 + 63 + 63 + 65 + 73 + 75 + 77 + 77 + 85 + 89 + 89 + 89 + 91) / 16 = 71.5625 =~ 71.6
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