Sample Variance: Simple Definition, How to Find it in Easy Steps

Sample variance can be defined as the average of the squared differences from the mean. There are two formulas to calculate the sample variance: ∑n =1(x −μ)2 n−1 ∑ i = 1 n ( x i − μ) 2 n − 1 (ungrouped data) and ∑n =1f(m −¯ ¯x)2 n−1 ∑ i = 1 n f ( m i − x ¯) 2 n − 1 (grouped data) Download FREE Study Materials Sample Variance Worksheet

Get assistance

If you need help, don't hesitate to ask for it.

Fast Delivery

Our fast delivery service ensures that you'll get your order quickly and efficiently.

SOLVING

Solving problems is a skill that can be learned.

Our people love us
Figure out mathematic questions

How to Calculate Sample Variance

In order to get the standard deviation, take the square root of the sample variance: √9801 = 99. The standard deviation, in combination with the mean

Explain mathematic questions

Math questions can be tricky, but with a little patience and perseverance, you can find the answer.

Free time to spend with your friends

I love spending time with my family and friends.

Decide math

If you're looking for a fun way to teach your kids math, try Decide math. It's a great way to engage them in the subject and help them learn while they're having fun.

Variance Calculator

What is the variance of this sample? All students have 100 points on this exam. 1. Add up all of the numbers: Sum = 1000. 2. Count the numbers of items in your sample. In this sample, there are 10 items or students. 3. Divide the number

  • 583

    Math Specialists

  • 99%

    Improved Their Grades

3 Ways to Calculate Variance

The sample variance, s², is used to calculate how varied a sample is. In statistics, a data sample is a set of data collected from a population. Typically, the population is very large, making a

Deal with mathematic equation

Figure out math problems

Solving math problems can be fun and challenging!

Do mathematic problem

Decide math problem

If you're looking for a fun way to teach your kids math, try Decide math. It's a great way to engage them in the subject and help them learn while they're having fun.

Explain math question

Solve math equations

To solve a math equation, you need to find the value of the variable that makes the equation true.

Clarify math equation

Sample Variance

The formula for variance for a sample set of data is: Variance = s 2 = Σ ( x i − x ¯) 2 n − 1 Variance Formula The formula for variance of a is the sum of the squared differences between each data point and the mean, divided by the number of