Why is there no fuction for calculating the mean, such as mean or meanby?

[simbahebinbo]

package main

import (
	"fmt"
	"github.com/samber/lo"
)

func main() {
	// 一组数字
	numbers := []float64{1.0, 2.5, 3.7, 4.2, 5.1}

	// 使用 lo 包计算平均值
	average := lo.Mean(numbers)

	// 打印结果
	fmt.Printf("平均值: %f\n", average)
}