(You may need a large display to see the whole table.) The Z-table below gives numerical values for the cummulative distribution function $\Phi(x)$ of the standard normal random variable $Z$. Now, to find the value of $\Phi(-0.75)$ from the Z-table, we use the symmetry of the bell curve as in part (b) and we see $\Phi(-0.75) = 1 – \Phi(0.75)$. To make use of the Z-table, we need to relate current problems to a standard normal distribution $\mathcal \right)\\
The Z-table is available at the bottom of this article.
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