luey3325 luey3325

16-08-2022
Mathematics

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The following data represent the percentage impurities in a certain chemical substance. percentage of impurities frequency percentage of impurities frequency less than 5 0 10-10.9 45 5-5.9 1 11-11.9 30 \ 6-6.9 6 12-12.9 5 7-7.9 29 13-13.9 3 8-8.9 75 14-14.9 1 9-9.9 85 (\mathfrak{i}) calculate the mean and standard deviation.

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