The table below shows a frequency distribution of the lifetimes of electronic tubes produced at a factory, determine the percentage of electronic tubes with lifetimes are at least 400 hours but less than 700 hours. A-19% B-29.5% C-78% D-51.5% E-45%

The table below shows a frequency distribution of the lifetimes of electronic tubes produced at a factory, determine the percentage of electronic tubes with lifetimes are at least 400 hours but less than 700 hours. A-19% B-29.5% C-78% D-51.5% E-45%

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter15: Experimental Methods

Section: Chapter Questions

Problem 1CQ

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Question

Engineering statistics, i need solutions in 10 minutes please. MCQ/The table below shows a frequency distribution of the lifetimes of electronic tubes produced at a factory, determine the percentage of electronic tubes with lifetimes are at least 400 hours but less than 700 hours. A-19% B-29.5% C-78% D-51.5% E-45%

Lifetime
Number of
(hours)
Electronic Tubes
300-399
14
400-499
46
500-599
58
600-699
76
700-799
68
800-899
62
900-999
48
1000-1099
22
1100-1199
6.

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