Mean of Array After Removing Some Elements

20.0% Acceptance

In this lab, you will implement a function to calculate the mean of the remaining integers of an array after removing the smallest 5% and the largest 5% of the elements. Your solution should correctly handle arrays of varying sizes and values, as long as they follow the constraints provided.

The function must return the mean, and answers within a 10-5 range of the actual answer will be accepted. Keep in mind that you should use ESM import/export everywhere.

To better understand the problem, take a look at the following examples:

Example 1:

Input: arr = [1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3] Output: 2.00000 Explanation: After erasing the minimum and the maximum values of this array, all elements are equal to 2, so the mean is 2.

Example 2:

Input: arr = [6,2,7,5,1,2,0,3,10,2,5,0,5,5,0,8,7,6,8,0] Output: 4.00000

Example 3:

Input: arr = [6,0,7,0,7,5,7,8,3,4,0,7,8,1,6,8,1,1,2,4,8,1,9,5,4,3,8,5,10,8,6,6,1,0,6,10,8,2,3,4] Output: 4.77778

Make sure your function follows these constraints:

  • 20 <= arr.length <= 1000
  • arr.length is a multiple of 20.
  • 0 <= arr[i] <= 105


  1. Implement the trimMean() function
  2. Export the trimMean() function
  3. Handle edge cases