Function mean

mean(arr: number[], type?: "arithmetic" | "geometric" | "harmonic"): number
Calculates the mean of an array.
Parameters
- arr: number[]
  The array
- Optionaltype: "arithmetic" | "geometric" | "harmonic" = "arithmetic"
  The type of mean, which can be "arithmetic", "geometric", or "harmonic"
Returns number
- Defined in Chalkboard.stat.ts:666