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probability

The weight of smelt is a normal variable with mean 1.5 ounces and standard deviation of 0.2 ounces. Find the probability that a randomly selected  smelt weighs more than 1.348 ounces.

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Deanna L. | Electrical engineering major and music lover with MIT degreeElectrical engineering major and music l...
4.9 4.9 (120 lesson ratings) (120)
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First calculate the number of standard deviations:
(1.348-1.5)/.2=-.76
 
Then use Excel to find the probability under a normal distribution curve up to .76 std deviations below average:
normsdist(-.76)=.2236
 
Hope that helps,
Deanna