Thread: normal distribution problem

A certain brand of soft drink is in a so called "litre" bottle. In fact, the amount of liquid in each bottle (in litres) is a normally distribuited random variable with mean 1.005 and standard deviation 0.01.

a) If I buy four bottles, find the probability that the mean contents of the four bottles is less than 1 litre.

Originally Posted by shawli

A certain brand of soft drink is in a so called "litre" bottle. In fact, the amount of liquid in each bottle (in litres) is a normally distribuited random variable with mean 1.005 and standard deviation 0.01.

a) If I buy four bottles, find the probability that the mean contents of the four bottles is less than 1 litre.

i think its 1.005-1/ .01 = .5