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Simpangan rata-rata data 9, 3, 7, 8, 4, 5, 4, 8 adalah...

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$x with bar on top equals fraction numerator 9 plus 3 plus 7 plus 8 plus 4 plus 5 plus 4 plus 8 over denominator 8 end fraction equals 48 over 8 equals 6 S subscript r equals 1 over n sum from i equals 1 to n of vertical line x subscript i minus top enclose x vertical line S subscript r equals 1 over 8 sum from i equals 1 to 8 of vertical line x subscript i minus top enclose x vertical line S subscript r equals 1 over 8 left parenthesis vertical line 9 minus 6 vertical line plus vertical line 3 minus 6 vertical line plus vertical line 7 minus 6 vertical line plus vertical line 8 minus 6 vertical line plus vertical line 4 minus 6 vertical line plus vertical line 5 minus 6 vertical line plus vertical line 4 minus 6 vertical line plus vertical line 8 minus 6 vertical line right parenthesis S subscript r equals 1 over 8 left parenthesis 16 right parenthesis equals 2$