Z-score definition. How to calculate it (includes step by step video). Hundreds of statistics help articles, videos.

Oct 24, 2024 · To find the Z score of a sample, you'll need to find the mean, variance and standard deviation of the sample. To calculate the z-score, you will find the difference between …

In statistics, there are a lot of different ways to determine if a data point is unusual, so there isn't a definitive value we need to worry about here. Want to learn more about z-scores? Check out …

The formula for finding z-scores is the following: X represents the data point of interest. Mu and sigma represent the mean and standard deviation for the population from which you drew your …

To calculate the z-score, use the formula z= (x-μ)/σ, where x is the raw score, μ is the mean and σ is the standard deviation. In words, subtract the mean from the raw score and then divide by …

Calculator to find out the z-score of a normal distribution, convert between z-score and probability, and find the probability between 2 z-scores.

Therefore, a z -score counts how many standard deviations a data point is above or below the mean. The image below shows both the z -score and the values from the empirical rule for this …

Aug 31, 2025 · Learn how to calculate the z-score in statistics with a clear step-by-step method. Explore the formula, see examples, and understand how to interpret z scores.

Worry not – this article will provide you with a comprehensive understanding of z-scores and demonstrate the step-by-step process of calculating them. What is a Z-Score?

Nov 4, 2025 · With the first method above, enter one or more data points separated by commas or spaces and the calculator will calculate the z-score for each data point provided from the same …