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.

Aug 30, 2022 · This tutorial explains how to find a probability from a z-score, including several examples.

In order to use a z-score, you need to know the mean μ and also the population standard deviation σ. Z-scores are a way to compare results to a “normal” population. Results from tests …

Nov 3, 2025 · Learn how to find probability from a z score using z tables. Step-by-step examples using positive and negative z tables.

Use two interactive Z-score calculators to find the Z-score and to calculate the probabilities associated with it.

Calculate the Probability of Z-score quickly with our interactive Z-score calculator. Find probabilities for less than, greater than, or between Z-scores.

Mar 20, 2025 · Enter your z-score in the input field. Click "Calculate" to see the probability of values being below (left-tailed) this z-score. The result shows both the percentage and decimal …

The primary tool utilized for translating a z-score into a probability is the z-table, frequently referred to as the standard normal table. This essential resource systematically lists the areas …

Calculate z-scores, find probabilities, and analyze data using the standard normal distribution with step-by-step explanations.

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 …