﻿ Probability Using Standard Deviation Calculator with Steps - Online & Free!

# Probability Using Standard Deviation Calculator

## Use our simple online Probability calculator to find the Probability Using Standard Deviation.

Share Standard Deviation Calculator

1. For Windows or Linux - Press Ctrl+D

2. For MacOS - Press Cmd+D

3. For iPhone (Safari) - Touch and hold, then tap Add Bookmark

4. For Google Chrome - Press 3 dots on top right, then press the star sign

## How to use the Probability Using Standard Deviation Calculator

1

### Step 1

Enter your set of numbers in the input field. Numbers must be separated by commas.

2

### Step 2

Press Enter on the keyboard or on the arrow to the right of the input field.

3

### Step 3

In the pop-up window, select “Find the Probability Using Standard Deviation”. You can also use the search.

## What is Probability Using Standard Deviation

It really depends on the type of distribution you have. Assuming that your data set is approximately normally distributed, you can take a point estimate and calculate your z-score, where z = (x - x ∗) / σ and x is your point estimate, x * is your average, and σ - your standard deviation.

Using your z score, you can see this in the cumulative distribution function φ (x), where φ (z) = P. There are Excel functions and tables that show a list of values for z and their values in CDF If your data generally does not diffuse, you must take into account the asymmetry, excess and the like.