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.

1 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.
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