Problem

- Suppose $X$ is normal with mean 8.0 and standard deviation 5.0
- Find $P (X < 8.6)$

Answer

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Hide Steps

Answer

$P (X < 8.6) = P (Z < 0.12)$

Steps

Step 1 ： $Z = \frac{X - μ}{σ}$

Step 2 ： $Z = \frac{8.6 - 8.0}{5.0}$

Step 3 ： $P (X < 8.6) = P (Z < 0.12)$

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