A C program to find mean, variance and standard deviation

A C program to find mean, variance and standard deviation

By Manjunath PM - March 11, 2015

```
#include <stdio.h>
```
```
#include <math.h>
```
```
void main()
```
```
{
```
```
    float x[MAXSIZE];
```
```
    int  i, n;
```

    float average, variance, std_deviation, sum = 0, sum1 = 0;

```
 
```
```
    printf("Enter the value of N \n");
```
```
    scanf("%d", &n);
```
```
    printf("Enter real numbers \n");
```
```
    for(i = 0; i < n; i++)
```
```
    {
```
```
        scanf("%f",&x[i]);
```
```
    }
```
```
    for(i= 0; i < n; i++)
```
```
    {
```
```
        sum=sum+x[i];
```
```
    }
```
```
    average=sum /n;
```
```
    for(i=0;i<n;i++)
```
```
    {
```

        sum1=sum1+pow((x[i]-average),2);

```
    }
```
```
    variance=sum1/n;
```
```
    std_deviation=sqrt(variance);
```

    printf("Average of all elements = %f\n", average);

    printf("variance of all elements = %f\n", variance);

    printf("Standard deviation = %.2f\n", std_deviation);


getch();




clrscr();

```
}
```

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