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Iteru [2.4K]
3 years ago
9

The following stem-and-leaf plot shows scores on a recent literature exam for both Class A and B.

Mathematics
1 answer:
kondaur [170]3 years ago
3 0
The mean score is obtain by (sum of scores) ÷ (how many scores there are)

Class A:

Sum of scores = 60 + 68 + 70 + 75 + 84 + 86 + 90 + 91 + 92 + 94 + 94 + 96 + 100 + 100 = 1200

There are 14 scores in total

Mean scores of class A = 1200÷14 = 85.7
-----------------------------------------------------------------------------------------------------

Sum of scores of class B = 60 + 60 + 70 + 71 + 73 + 73 + 75 + 76 + 77 + 84 + 85 + 86 + 91 + 92 = 1073

Number of scores of class B = 14
Mean scores of class B = 1073÷14 = 76.6
-----------------------------------------------------------------------------------------------------
Class A has the highest mean score
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