Statistics in Engineering by Metcalfe Andrew; Greenfield Tony; Green David

Author:Metcalfe, Andrew; Greenfield, Tony; Green, David
Language: eng
Format: epub
Publisher: CRC Press LLC

(i) The expected value of the natural logarithm of cycles to failure is 13.806.

(ii) Exponential of the expected value of the natural logarithm of cycles to failure is 990 610.

(iii) The expected value of the number of cycles to failure, using the adjustment factor based on the lognormal distribution, is 1 034 396.

(iv) A 95% confidence interval for the mean number of cycles to failure, using the first adjustment factor, in 1 000 s is [873, 1 226].

(v) A 95% prediction interval for the mean number of cycles to failure in 1 000 s is [513, 1 912].

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