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4.2.2 Statistical distributions (A-level only)

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Question 3
65%

The weights of bags of sugar, W W\,W grams, are normally distributed. It is known that P(W<490)=0.15P(W < 490) = 0.15P(W<490)=0.15 and P(W>515)=0.25P(W > 515) = 0.25P(W>515)=0.25.

Find the mean and standard deviation of the weights of the bags of sugar.

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4.2.2 Statistical distributions (A-level only) Questions

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