Finite Math Examples

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The z-score for a value of a random variable is the number of standard deviations that falls from the mean .
The z-score converts a non-standard distribution to a standard distribution in order to find the probability of an event.
Find the z-score.
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Fill in the known values.
Simplify the expression.
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Simplify the numerator.
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Multiply by .
Subtract from .
Divide by .
The z-score for a value of a random variable is the number of standard deviations that falls from the mean .
The z-score converts a non-standard distribution to a standard distribution in order to find the probability of an event.
Find the z-score.
Tap for more steps...
Fill in the known values.
Simplify the expression.
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Simplify the numerator.
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Multiply by .
Subtract from .
Divide by .
Find the value in a look up table of the probability of a z-score of less than .
has an area under the curve
Find the value in a look up table of the probability of a z-score of less than .
has an area under the curve
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.
Find the area between the two z-scores.
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Multiply by .
Add and .
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