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Find the probability that a light bulb

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Reference no: EM132853171

Suppose a brand of light bulbs is normally? distributed, with a mean life of 1100 hr and a standard deviation of 150 hr.

Find the probability that a light bulb of that brand lasts between 920 hr and 1295 hr.

Areas Under the Standard Normal Curve

z A z A

1.00 .3413 1.50 .4332
1.10 .3643 1.60 .4452
1.20 .3849 1.70 .4554
1.30 .4032 1.80 .4641
1.40 .4192 1.90 .4713

The probability that a light bulb will last between 920 hr and 1295 hr is ____.

?(rounded to four decimal places as? needed.)

Reference no: EM132853171

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