z-Score Calculator: Standard Normal Distribution
Math Statistics Percentile
z-Score Calculator
Inputs
Left
Right
Left Right Equal Area
Left Right Different Areas
Middle Equal Area
Middle Different Areas
Left z-Score:
Right z-Score
Solution
Left Tail Area:
value
Right Tail Area:
value
Total Area:
value
Percentile/Probability:
value
%
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Description:
This calculator determines the area under the standard normal curve given z-Score values. The area represents probability and percentile values. The calculator allows area look up with out the use of tables or charts. In addition it provide a graph of the curve with shaded and filled area.
The z-score is the number of standard deviations from the mean.
The standard normal distribution is a normal distribution with a standard deviation on 1 and a mean of 0.
The z-score is the number of standard deviations from the mean.
The standard normal distribution is a normal distribution with a standard deviation on 1 and a mean of 0.
Instructions:
- Select area type.
- Adjust z-Score by using the steppers or manually entering the values.
- Note, the solutions will automatically be updated when either of the input date fields are modified or changed.
Area Types:
- Left
- Right
- Left Right Equal Area
- Left Right Different Area
- Middle Equal Area
- Middle Different Area
Flash/Flex version:
This calculator has been updated to use Javascript. This allows the app to be used on smart mobile phones and tablets. The older Flash/Flex version is available via the link below.
z-Score Calculator (Old Version)
z-Score Calculator (Old Version)
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