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quantitative tool in business

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MAY 2012 QUANTITATIVE TOOLS IN BUSINESS SOLUTION 2(ii)Cumulative Frequency Distribution TableLess than9.5-14.519.524.529.534.539.544.549.554.559.564.5Σf01381422313843464950Frequency TableFields- 14- 19- 24- 29- 34- 39- 445– 492– 545 – 592 - 64Frequency(f)Mid- po<strong>in</strong>t(x)___ fx x 2 fx 21121214414421734289578522110484 2420627162729 4374832256 1024 8192937333 1369 12 321742294 1764 12 348547235 2209 11 045352156 2704 8 112357171 3249 9 747162623844 3 844Σf50 Σfx1825 Σfx 2 73,125Mean (x) = Σfx = 1825 = 36.5 kgΣf 50____________Std deviation = √ Σfx 2 - Σfx2Σf Σf________________= √ 73125 - 1825250 50_______________ ______= √ 1462.5 - 1332.25 = √ 130.25σ= 11.41 kgPage 10 of 12

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