Coefficient of Variation
MediumStatisticsMathArray
Description
Given an array nums of positive numbers, return the coefficient of variation (population standard deviation divided by the mean), rounded to 4 decimal places.
Examples
Input:
nums = [2,4,6,8]Output:
0.4472Explanation:
Dividing the population standard deviation by the mean gives 0.4472.
Input:
nums = [10,12,14]Output:
0.1361Explanation:
Dividing the population standard deviation by the mean gives 0.1361.
Input:
nums = [5,5,5]Output:
0Explanation:
Dividing the population standard deviation by the mean gives 0.
Constraints
- •
1 ≤ nums.length ≤ 10⁴ - •
mean(nums) > 0