A manufacturing company produces electric insulators. If the insulators break wh

Question

A manufacturing company produces electric insulators. If the insulators break when in use, a short circuit is likely to occur. To test the strength of the insulators, destructive testing in high-powered labs is carried out to determine how much force is required to break the insulators. Force is measured by observing how many podsmst be applied to the insulator before it breaks. Data are ccllected from a sample of 30 insulators. The strengths are as follows. Complete parts a through c. 1,647 1,485 1417 1,585 1,514 1,724 1,601 1,518 1,498 1.659 1,694 1,607 1.782 1,816 1,682 1,671 1,849 1,529 1,735 1,789 1,782 1,555 1,849 1,855 1,643 1.783 1,622 1,689 1.699 1,646 1,400 but less than 1,500 1,500 but less than 1,600 1,600 but less than 1,70012 1,700 but less than 1,800 1,800 but less than 1,900 Construct a percentage distribution. Strength 1,400 but less than 1,500 1.500 but less than 1,600 1,600 but less than 1,700 1,700 but less than 1,800 1.800 but less than 1,900 10% 16.67 % 40% 20% 13.33 % (Round to two decimal places as needed.) b. Construct a cumulative percentage distribution. Strength 1.400 1,500 1,600 1,700 1,800 1,900 Cumulative Percentage 100%

Explanation / Answer

In part (b), what is required to be expressed is the cumulative percentage when the actual strength is less than the figure shown.So the value in the first row and 2nd column shows the percentage when the actual measured strength is less than 1400.

So the respective cumulative percentages corresponding to strangths of 1400,1500, 1600, 1700, 1800,1900 or less are 0%, 10%, 26.67%,66.67%, 86.67% and 100%v respectively.

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