(Answered) Suppose a brand of light bulbs is normally distributed with

Statistics

Suppose a brand of light bulbs is normally distributed, with a mean life of 1800 hr and a standard deviation of 150 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

Find the probability that a bulb of the brand lasts between 1515 hr and 2010 hr.

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