how did 0.9 become 1.282

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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how did 0.9 become 1.282

Let the average lifetime be Ỹ. Using the CLT and second row of the table,
P(Ỹ <y) = 0.9
у — 750
PZ <
40
= 0.9
V50
у — 750
40
= 1.282
V50
y = 757
Transcribed Image Text:Let the average lifetime be Ỹ. Using the CLT and second row of the table, P(Ỹ <y) = 0.9 у — 750 PZ < 40 = 0.9 V50 у — 750 40 = 1.282 V50 y = 757
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