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Mathematics 15 Online
OpenStudy (anonymous):

The weight Y (in grams, denoted as g) of a pack of coffee is normally distributed with mean 250 g and variance 4 g^2. Calculate P(248

OpenStudy (adamaero):

You and me both. Sorry.

OpenStudy (anonymous):

\[\begin{align*} P(248<Y<252)&=P\left(\frac{248-250}{4}<\frac{Y-250}{4}<\frac{252-250}{4}\right)\\\\ &=P(-0.5<Z<0.5)\\\\ &=2P(0<Z<0.5) \end{align*}\]

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