#include <stdio.h>
#include <math.h>
double CalculateMean(const double data[], int size) {
if (size == 0) return 0.0;
double sum = 0.0;
for (int i = 0; i < size; i++) {
sum += data[i];
}
return sum / size;
}
double CalculateStandardDeviation(const double data[], int size, double mean) {
if (size < 2) return 0.0;
double sumOfSquaredDifferences = 0.0;
for (int i = 0; i < size; i++) {
double diff = data[i] - mean;
sumOfSquaredDifferences += diff * diff;
}
double variance = sumOfSquaredDifferences / (size - 1); // sample standard deviation
return sqrt(variance);
}
int main() {
double numbers[] = {3.4, 1.8, 4.3, 5.0, 6.2};
int size = sizeof(numbers) / sizeof(numbers[0]);
double mean = CalculateMean(numbers, size);
double stddev = CalculateStandardDeviation(numbers, size, mean);
printf("Mean: %.2f\n", mean);
printf("Standard Deviation: %.2f\n", stddev);
return 0;
}
/*
run:
Mean: 4.14
Standard Deviation: 1.66
*/
