Suppose a brand of light bulbs is normallydistributed, with a mean life of 1400 hr and a standard deviation of 50hr.

Find the probability that a light bulb of that brand lasts between 1325 hr and 1470 hr.

The probability that a light bulb will last between 1325 hr and 1470 hr is _____

(Type an integer or decimal rounded to four decimal places asneeded.)

Areas Under the Standard Normal Curve Z A Z 1.00 A .3413 1.50 4332 1.10 .3643 1.60 .4452 1.20 .3849 1.70 1.30 4554 4032 1.80 1.40 4641 4192 1.90 4713