In our interactive exercises, we will see how to work with tables to look up the exact area under the curve associated with any Z-score, not just the landmarks shown on these illustrations.

To find a specific area under a normal curve, find the z-score of the data value and use a Z-Score Table to find the area. A Z-Score Table, is a table that shows the percentage of values (or area …

Use this simple z-Score calculator. Solve for probability, percentile and standard normal distribution curve area.

These lessons, with videos, examples and step-by-step solutions, help Statistics students learn how to use z-scores to work out probability based on the normal distribution.

When a data set is normally distributed we can use a standardized score, called the z-score, to determine the number of standard deviations that a data value is from the mean. Reconsider an …

A z-score tells you where the score lies on a normal distribution curve. A score of zero tells you the values is exactly average while a score of +3 tells you that the value is much higher than average.

Specifically, z scores will tell us how far the score is away from the mean in units of standard deviations and in what direction. The value of a z score has two parts: the sign (positive or negative) and the …

Apr 21, 2025 · What is a Z Score? A Z score is a measure of how many standard deviations an element is from the mean. It’s calculated using the following formula: Z = (X - μ) / σ. Where: - Z is the Z score …

Oct 27, 2025 · Learn about the standard normal distribution (also called the z-distribution) and how to compute probability using the z-table. Practice applying these concepts to find probabilities for …

Sep 13, 2024 · In this article, I will explain the concept of z-score using simple, relatable examples. We’ll start with the basics of z-score and the formula to calculate it.