// Contributed by - Anuj Das ( GC University, Silchar - @ Department of Computer Science )

// 2. Write a C program to compute the Standard Deviation.

#include<stdio.h>

#include<math.h>

float findMean(int arr[], int size) {

int i;

float sum = 0;

// Sum all elements of the array

for (i = 0; i < size; i++) {

sum += arr[i];

}

// Divide the sum by the size of the array to get the mean

return sum / size;

}

float findStandardDeviation(int arr[], int size, float mean) {

int i;

float sum = 0;

// Calculate the sum of the squares of the differences between each element of the array and the mean

for (i = 0; i < size; i++) {

sum += pow(arr[i] - mean, 2);

}

// Divide the sum by the size of the array, and take the square root to get the standard deviation

return sqrt(sum / size);

}

void main() {

int size, i;

printf("Enter the size of the Array: ");

scanf("%d", &size);

int arr[size];

printf("Enter %d Elements: \n", size);

for (i = 0; i < size; i++) {

scanf("%d", &arr[i]);

}

printf("Mean: %.2f\n", findMean(arr, size));

printf("Standard Deviation: %.2f\n", findStandardDeviation(arr, size, findMean(arr, size)));

}