Finite Math Examples

$- 1.44 < Z < 1.44$

Step 1

Find the value in a look up table of the probability of a z-score of less than $0.42509332$ .

$z = - 1.44$ has an area under the curve $0.42509332$

Step 2

Find the value in a look up table of the probability of a z-score of less than $0.42509332$ .

$z = 1.44$ has an area under the curve $0.42509332$

Step 3

To find the area between the two z-scores, subtract the smaller z-score value from the larger one. For any negative z-score, change the sign of the result to negative.

$0.42509332 - (- 0.42509332)$

Step 4

Find the area between the two z-scores.

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Step 4.1

Multiply $- 1$ by $- 0.42509332$ .

$0.42509332 + 0.42509332$

Step 4.2

Add $0.42509332$ and $0.42509332$ .

$0.85018664$