Implement a function mean(array) that returns the mean (also known as average) of the values inside array, which is an array of numbers.

Arguments

1. array (Array): Array of numbers.

Returns

(Number): Returns the mean of the values in array.

Examples

mean(\[4, 2, 8, 6\]); // => 5

mean(\[1, 2, 3, 4\]); // => 2.5

mean(\[1, 2, 2\]); // => 1.6666666666666667

The function should return NaN if array is empty.

mean([]); // => NaN

Resources

• Lodash _.mean