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{"ops":[{"insert":"The masses of 50 castings were measures. the results in kilograms were as follows: 4.6 4.7 4.5 4.6 4.7 4.4 4.8 4.3 4.2 4.8 4.7 4.5 4.7 4.4 4.5 4.5 4.6 4.4 4.6 4.6 4.8 4.3 4.8 4.5 4.5 4.6 4.6 4.7 4.6 4.7 4.4 4.6 4.5 4.4 4.3 4.7 4.7 4.6 4.6 4.8 4.9 4.4 4.5 4.7 4.4 4.5 4.9 4.7 4.5 4.6 (a) Arrange the data in 8 equal classes between 4.2 and 4.9 kilograms. [5] (b) Determine the frequency distribution for the 8 classes in (a). [5] (c) Draw the frequency histogram and frequency polygon using different colors for the frequency distribution in (b). [10] (d) For each of the 8 classes formed in (a), calculate the central value, the relative frequency, the lower boundary, and the upper boundary. [10] (e) Find the mean, median, mode, and standard deviation for the grouped data in (b). [30]\n"}]}
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