SOLUTION: Suppose that the wrapper of a certain candy bar lists its weight as 2.13 ounces. Naturally, the weights of individual bars vary somewhat. Suppose the weights of these candy bars va

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose that the wrapper of a certain candy bar lists its weight as 2.13 ounces. Naturally, the weights of individual bars vary somewhat. Suppose the weights of these candy bars va      Log On


   

Question 742895: Suppose that the wrapper of a certain candy bar lists its weight as 2.13 ounces. Naturally, the weights of individual bars vary somewhat. Suppose the weights of these candy bars vary according to the normal distribution with mean 2.2 ounces and standard deviation 0.04 ounces. What proportion of the candy bars weigh less than the advertised weight?
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
P(X < 2.13) = P%28Z+%3C+%282.13+-+2.2%29%2F0.04%29
= P(Z < -1.75)
= 0.0401 or 4.01%