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.

When you have multiple samples and want to describe the standard deviation of those sample means (the standard error), you would use this z score formula: z = (x – μ) / (σ / √n)

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 …

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 …

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 …

Aug 1, 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 …

Oct 6, 2023 · The formula for calculating a z-score is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z …

To calculate the z-score, one subtracts the population mean from the specific raw score or data point (such as a test score, height, age, etc.) and then divides this difference by the population …

Apr 21, 2025 · When you’re analyzing test scores, investment returns, or scientific data, a Z-score tells you how many standard deviations a value is from the mean. This article breaks it down …

Learn how to use our Z-score Calculator to find standard deviations from the mean. Understand z-score formulas, interpretations, and applications in statistics with step-by-step examples.