Statistics Examples

$μ = 15$ , $σ = 1$ , $x = 12.5$

Step 1

The z-score converts a non-standard distribution to a standard distribution in order to find the probability of an event.

$\frac{x - μ}{σ}$

Step 2

Find the z-score.

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Step 2.1

Fill in the known values.

$\frac{12.5 - (15)}{1}$

Step 2.2

Simplify the expression.

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Step 2.2.1

Divide $12.5 - (15)$ by $1$ .

$12.5 - (15)$

Step 2.2.2

Multiply $- 1$ by $15$ .

$12.5 - 15$

Step 2.2.3

Subtract $15$ from $12.5$ .

$- 2.5$

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