The scores of 5 students in an examination are: 6, 5, 8, 7 and 4. Find the variance.

The scores of 5 students in an examination are: 6, 5, 8, 7 and 4. Find the variance.
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4,5,6,7, 8.... num numbers=5, sum=30, averaej=6 . . . sum av squares=10 . . . varians=2 . . . std variashun=1.41421 (root(2))
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