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The performance of 20 students on their final exam on statistics in 1992 and for the second class of 20 students in 2017 is shown

The performance of 20 students on their final exam on statistics in 1992 and for the second class of 20 students in 2017 is shown in the table below.

Scores on statistics final exam, 1992 and 2017 Class of 1992 Class of 2017 80 100 91 99 91 94 80 94 74 94 74 88 73 88 75 81 76 88 73 89

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