package main
import (
"fmt"
"math"
)
func main() {
numbers := []float64{3.4, 1.8, 4.3, 5.0, 6.2}
mean := CalculateMean(numbers)
stddev := CalculateStandardDeviation(numbers, mean)
fmt.Printf("Mean: %.2f\n", mean)
fmt.Printf("Standard Deviation: %.2f\n", stddev)
}
func CalculateMean(data []float64) float64 {
if len(data) == 0 {
return 0.0 // Mean of an empty set is conventionally 0
}
sum := 0.0
for _, value := range data {
sum += value
}
return sum / float64(len(data))
}
func CalculateStandardDeviation(data []float64, mean float64) float64 {
n := float64(len(data))
if n < 2 { // Standard deviation for n=0 or n=1 is not typically meaningful
return 0.0
}
sumOfSquaredDifferences := 0.0
for _, value := range data {
diff := value - mean
sumOfSquaredDifferences += diff * diff
}
// Calculate variance (sample variance: divide by N-1)
variance := sumOfSquaredDifferences / (n - 1)
// Standard deviation is the square root of the variance
return math.Sqrt(variance)
}
/*
run:
Mean: 4.14
Standard Deviation: 1.66
*/
