C Program to find Mean and Standard deviation(SD) for a set of n numbers using array.

    In this example, we will calculate the mean and standard deviation for a set of n numbers entered by the user using array. 

 

PROGRAM TO FIND THE MEAN AND STANDARD DEVIATION(SD) FOR A SET OF N NUMBERS USING ARRAY.

#include<stdio.h>

#include<math.h>

#include<conio.h>

void main()

{

    int n,i;

    float x[50],mean,sd,sum;

    printf("How many numbers you want to enter : ");

    scanf("%d",&n);

    printf("Enter the numbers ");

    for(i=0;i<n;i++) 

    {

        scanf("%f",&x[i]);

    }

    for(i=0;i<n;i++)

    {

        sum+=x[i];

    }

    mean=sum/n;

    sum=0;

    for(i=0;i<n;i++)

    {

        sum=sum+(x[i]-mean)*(x[i]-mean);

    }

    sd=sqrt(sum/n);

    printf("Mean =%6.3f\n",mean);

    printf("Standard Deviation : %6.3f\n",sd);

    getch();

}

OUTPUT  TO FIND THE MEAN AND STANDARD DEVIATION(SD) FOR A SET OF N NUMBERS USING ARRAY.

 How many numbers you want to enter : 5

 Enter the numbers 23.3

 12

 45

 63

 5.5

 Mean =29.760

 Standard Deviation : 21.368

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