How To Find Z Score On Excel

To find the Z-score on Excel, use the formula “=NORM.S.INV(probability)” where probability is the value for which you want to find the Z-score; the output will be “”.

In the world of data analysis, understanding statistical measures is essential. One such measure is the Z score, which allows us to determine how far a given data point is from the mean in terms of standard deviations. Excel, widely regarded as a powerful tool for data manipulation and analysis, provides a user-friendly approach to calculate Z scores. In this blog post, we will dive into the topic of finding Z scores on Excel and explore the various methods and formulas available to make this process easier. By the end, you’ll have a solid understanding of how to leverage Excel’s capabilities to effectively compute and interpret Z scores for your data sets. So, let’s get started and unlock the power of Excel in analyzing data through the lens of Z scores!

How To Find Z Score On Excel: Step-by-Step


Step 1: Prepare Your Data

One way to organize your data in Excel is by creating a worksheet that includes both the individual data points and the average value of your dataset. This helps you analyze the data more effectively and make calculations based on the mean value.

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Step 2: Calculate the Standard Deviation

The STDEV.P function in Excel is used to calculate the standard deviation of a population dataset, while the STDEV.S is used for a sample dataset from a larger population.

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Step 3: Calculate the Difference from the Mean

To calculate the Z score, subtract the mean from the data point you’re interested in by inputting the correct cell references. For instance, if the data point is in cell A2 and the mean is in cell B2, use the formula “=A2-B2” in a new cell.

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Step 4: Divide the Difference by the Standard Deviation

The Z Score is calculated by dividing the difference obtained in step 3 by the standard deviation. In a new cell, use the formula “= (result from Step 3) / (standard deviation)” to determine the Z Score, indicating the number of standard deviations the data point deviates from the mean.

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Step 5: Repeat for All Data Points (Optional)

To calculate Z Scores for all data points, repeat Steps 3 and 4 for each one. This helps identify outliers in your set accurately.


Calculating the z-score is a crucial statistical tool that allows us to standardize data to understand its relative position within a dataset. Thanks to Excel’s built-in functions, finding the z-score becomes a breeze, saving us time and effort. In this blog post, we learned how to use the NORM.S.INV function and the Z.TEST function to find the z-score in Excel. Whether we are conducting research, analyzing data, or making business decisions, having this knowledge empowers us to make informed and evidence-based choices. With a few simple steps, we can easily uncover valuable insights from our data and propel our analyses to the next level. Excel’s versatility and the availability of these functions make it an invaluable tool for any professional seeking to leverage the power of statistics. So, next time you encounter a dataset, remember to apply your newfound knowledge and uncover the hidden stories behind the numbers using Excel’s z-score calculations.

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