9709 P61 - Nov 2013 - Q1
3152
It is given that \(X \sim N(30, 49)\), \(Y \sim N(30, 16)\) and \(Z \sim N(50, 16)\). On a single diagram, with the horizontal axis going from 0 to 70, sketch three curves to represent the distributions of \(X, Y\) and \(Z\).
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