The weights of vegetable marrows supplied to retailers by a wholesaler have a normal distribution with mean 1.5 kg and standard deviation 0.02 kg.The wholesaler supplies three sizes of marrow-

Question

The weights of vegetable marrows supplied to retailers by a wholesaler have a normal distribution with mean 1.5 kg and standard deviation 0.02 kg.The wholesaler supplies three sizes of marrow-
                Size 1    under 1.48 kg
                 Size 2       from 1.48 to 1.53 kg
                 Size 3          over 1.53 kg
Find, to three decimal places , the proportions of marrows in the three sizes.

PsyDAG · Answer

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for each size.