# C Program To Find Mean Variance And Standard Deviation

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For my first c# code post I will start of with an easy one: Calculating the mean, the variance and the standard deviation of a set of data using c# math. These 3 functions were the first I had to write when I started on the SoapSynergy project written in c# for analyzing the stability and the flexibility of the human motor system.

• The mean is just the average, the value that is the sum of all values, divided by the number of values.
• The variance is a way to measure how far a set of numbers is spread out. The variance is an measure of how much a set of numbers change, how much variation there is in those numbers.
• The standard deviation measures how far the values in a set are spread out from the average, just as the variance does. But since the SD (standard deviation) uses the same units as the mean it is easier to interpret.

## C Program To Find Mean Variance And Standard Deviation Calculator

Nov 16, 2017 C Program to Calculate the Mean, Variance & Standard Deviation Code. Standard deviation = 28.19 More C Programs: at November 16, 2017. Email This BlogThis! Here in this c program, we need to find out mean variance and standard deviation of n numbers, for that we need to know what is meant by mean, standard deviation and variance. Mean: it is the average of a number of elements in a set of values. Which means just add the values in a set and divide the sum with the number of elements in the set. ## C Program To Find Mean Variance And Standard Deviation Calculator

Now to show you a quick code implementation of these 3 routines using c# math. Since I required means of n samples of data as well I used overloaded methods to support computation of the entire set as well as subsets. These methods also show the concept of extension methods in c#, in this case extending the default set of a generic list of doubles. #include<stdio.h>
#include<conio.h>
#include<math.h>
main()
{
int i,n;
float std_dev,sum=0,sumsqr=0,mean,value,variance=0.0,a;
clrscr();
printf(“nEnter number of data points”);
scanf(“%d”,&n);
printf(“nEnter data points”);
for(i=0;i<n;i++)
{
printf(“nPoint %d:”,i+1);
scanf(“%f”,&a[i]);
sum=sum+a[i];
}
mean=sum/n;
sumsqr=0;
for(i=0;i<n;i++)
{
value=a[i]-mean;
sumsqr=sumsqr+value*value;
}
variance=sumsqr/n;
std_dev=sqrt(variance);
printf(“nMean=%f”,mean);
printf(“nVariance=%f”,variance);
printf(“nstd_dev=%f”,std_dev);
getch();
return;
}