Standard deviation calculator to learn the standards deviation:

The standard deviation is important to analyze any set of data. For example, if you are conducting a survey report, and relying on this then the standard deviation is one of the main sources of analyzing the whole target market. The Standard deviation calculator is an impressive online tool to learn the standard deviation. The standard deviation becomes simple if you are able to develop all the steps of the standard deviation. These steps start from finding the average of all the data, the average of the data is the actual mean values. The mean value is subtracted from all the values and find then square the values. This is done to find the variance of the sample data of the whole set of populations. The sample is the representation of the whole population and it can be described as one of the representations of dataset values.

We can spot the following steps in the standard deviation:

  • Find the average or mean 
  • Subtract dataset values from the mean and take the square
  • Find the variance of dataset values

Find the average or mean:

Let’s suppose an example of data set values, and we are going to extract the mean or the average of the statistical data. The sd calculator is simple to extract the mean of the statistical data and their dataset values. It is essential to extract a sample from the population as it is impossible to track the information regarding each member of the population.

Let’s suppose the following example and the dataset values.

9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4

We first have to find the mean or average of all the values:


The total set of values is 140 and we have divided it by the total dataset values.

The total number of the dataset values=20

The mean or  μ =140/20= 7

Use the Standard deviation calculator to find the mean values and find the mean of even of the statical data of the whole set of population. There is a sequence of procedures in the standards deviation first we have to find the mean values, then we are going to subtract these mean values from the dataset values.

Subtract dataset values from mean and take square:

Now subtract the mean from all the dataset values and find the square of the difference in the statistical data. This is the second step in finding the mood and nature of the particular population.

Then for each of the numbers subtract the mean and square the result:

(9 – 7)2 = (2)2 = 4

(2 – 7)2 = (-5)2 = 25

(5 – 7)2 = (-2)2 = 4

(4 – 7)2 = (-3)2 = 9

(12 – 7)2 = (5)2 = 25

(7 – 7)2 = (0)2 = 0

(8 – 7)2 = (1)2 = 1

We find the square of all the values and the square of all the values.

4, 25, 4, 9, 25, 0, 1, 16, 4, 16, 0, 9, 25, 4, 9, 9, 4, 1, 4, 9

The  Standard Deviation Calculator is doing all the steps in a matter of seconds and we have no need to do all the spots to find the standard deviation for any set of data.

 The total sum of all the values is equal to 178.

= 4+25+4+9+25+0+1+16+4+16+0+9+25+4+9+9+4+1+4+9 = 178

The 178 is the sum of all the data set values and the total sum of values is 20. We need to divide all by the total number of values which is 20.

Divide by the Mean of squared differences

= (1/20) × 178 = 8.9

 The value is also called the variance of the dataset.

Then find the difference between all the dataset values. Then subtract all the values and find their square roots for members of the dataset values. You then have to add all the values of the dataset values and then add them and then again find their mean or average. Then whatever the mean in this case, you need to take the under root values. This is our standard deviation and it is describing a lot about a set of statistical data.

Find the variance of dataset values:

We are actually able to find the standard deviation or the variance of all the dataset values by the following calculation.

σ = √(8.9) = 2.983.

So the standards deviation of the dataset

 9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4

is equal to the

 σ = √(8.9) = 2.983. 

This is the following result of our dataset values. This data is describing the whole population of the statistical data variance of σ = √(8.9) = 2.983. It means the population is similar in nature. If the data have greater values of the standard deviation. Then it means the data is diversified.


The standard deviation is one of the prime statistical tools for extracting data. Businesses are investing heavily in finding the nature of the population. When you are able to find the response in a marketplace, then it is possible to design their product and service accordingly. The Standard deviation calculator is a simple way to extract the information from the dataset values. When a business is able to track the nature of variance against a certain variable like the price, then they try to devise a strategy for that to become competitive in the marketplace. In the competitive market, you can’t escape the competition. Your competitor is behind to eat you from the market.

Samir Prakash Author