document.write( "Question 1009884: A vending machine is designed to dispense a mean of 7.6 oz of coffee into an 8 oz cup. The standard deviation of the amount of coffee dispensed is .4 oz.
\n" ); document.write( "a. Find the percent the machine will dispense from 7.4 oz to 7.7 oz.
\n" ); document.write( "b. Dispense less than 6.9 oz\r
\n" ); document.write( "\n" ); document.write( "I have it figured out that from 7.6 to 7.2 on the bell shaped curve is 34% but when I tried to add it up I couldn't go any where. i also got a probable answer of 12.75% for a. Please help! \n" ); document.write( "
Algebra.Com's Answer #625361 by stanbon(75887)\"\" \"About 
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A vending machine is designed to dispense a mean of 7.6 oz of coffee into an 8 oz cup. The standard deviation of the amount of coffee dispensed is .4 oz.
\n" ); document.write( "a. Find the percent the machine will dispense from 7.4 oz to 7.7 oz.
\n" ); document.write( "z(7.4) = (7.4-7.6)/0.4 = -0.5
\n" ); document.write( "z(7.7) = (7.7-7.6)/0.4 = 0.25
\n" ); document.write( "---
\n" ); document.write( "P(7.4< x < 7.7) = P(-0.5< z < 0.25) = normalcdf(-0.5,0.25) = 0.2902
\n" ); document.write( "------------------------------\r
\n" ); document.write( "\n" ); document.write( "b. Dispense less than 6.9 oz
\n" ); document.write( "z(6.9) = (6.9-7.6)/0.4 = -1.75
\n" ); document.write( "---
\n" ); document.write( "P(x < 6.9) = P(z < -1.75) = normalcdf(-100,-1.75) = 0.0401
\n" ); document.write( "----------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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