document.write( "Question 627957: Light bulbs from the Bright Eyes Electric Company have a known mean lifetime of 800 hours and a standard deviation of 60 hours. This data is normally distributed. Find the probability that a random sample of 16 bulbs will have a mean lifetime between 790 and 810 hours. \n" ); document.write( "

Algebra.Com's Answer #395259 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( " = 800 hours and = 60 hours
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document.write( "Find the probability that a random sample of 16 bulbs will have a mean lifetime between 790 and 810 hours.
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document.write( "*Note: 
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document.write( "P( z = 10/15)  - P(z = -10/15) = .7475 -.2525 \n" );
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