Explanation Calculation: Boston shingles: For the given data, we find the frequency distribution and the percentage frequency distribution as follows: Class Interval Frequency Relative Frequency Percentage Frequency Lower Limit Upper Limit 3,015 3,050 2 0.0054 0.54% 3,050 3,085 44 0.1196 11.96% 3,085 3,120 122 0.3315 33.60% 3,120 3,155 131 0.3560 35.60% 3,155 3,190 58 0.1576 15.76% 3,190 3,225 7 0.0190 1.90% 3,225 3,260 3 0.0082 0.82% 3,260 3,295 1 0.0027 0.27% Totals 368 1 100.00% Histogram of the data: From the above numerical and graphical summary of Boston shingles, we observe that only 0.54% and 0.27% of the shingles are under weighed and over weighed respectively. The remaining ( 100 − 0.54 − 0.27 ) % = 99.19 % are in the company’s expectation. Vermont shingles: For the given data, we find the frequency distribution and the percentage frequency distribution as follows: Class Interval Frequency Relative Frequency Percent Frequency Lower Limit Upper limit 3,550 3,600 4 0

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Author: Levine

Publisher: PEARSON CO

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Chapter 2, Problem 2.109RWE

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whether the weights of the two types of shingles are expected by the company or not

Solution Summary: The author explains that only 0.54% and 0.27% of the shingles are under weighed, while the rest are in the company's expectation.

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