Enter the total proportion of the area under the curve of any data set. The calculator will convert the are proportion of the area into the raw Z score.
- Z Score Calculator
- T Statistic Calculator
- Point Estimate Calculator
- Relative Standard Deviation Calculator
Area to Z Score Formula
The following table is used to calculate the z score from an area.
|Proportion of Area (P-Value)||Z|
The proportion of the area under the curve is also known as the P-value. This can be represented as a decimal or a percentage. For example, in the table above, 80% would be equal to a decimal amount of .80.
Often times this p-value is also considered to be the confidence interval. That’s because a confidence interval is a percentage of a data set that you feel is accurate.
For the use of the calculator above, you must select the P-Value from the drop down menu, then hit calculate. The calculator will return the corresponding z-score.
A z-score is a statistical value used to related a single value to the overall mean of a group of data.
A p value is a proportion of the area, or proportion of a data set used in a statistical measurement.