Luke left out a number while putting the numbers in order. The correct answer is 16.
Numbers given are 16, 24, 12, 7, 30, 11, 22.
Let us arrange the numbers in ascending order, starting from left to right,
The correct order is 7, 11, 12, 16, 22, 24, 30.
While Joe arranged them in the following manner:
x x 16 22 24 30 (left out a number)
He got the median as the average of the middle numbers.
Joe got (16+22)/2 = 19 as answer.
The median is the middle number in a sorted, ascending, or descending, list of numbers and can be more descriptive of that data set than the average.
Since the total number of observations is odd so median will be the middle number.
So, the median is 16.
Hence, Luke left out a number while putting the numbers in order. The correct answer is 16.
To get more about median refer to the link,
https://brainly.com/question/26177250