Question

understand mean and mad - tutorial - level 1
find the mad, the average of the distances from the mean.

score mean distance from the mean (absolute deviation)
21 23 2
21 23 2
21 23 2
22 23 1
22 23 1
22 23 1
22 23 1
22 23 1
28 23 5
29 23 6

the code breakers leaderboard
mean = 23
done

Explanation:

Step1: Count total data points

Count of scores = 10

Step2: Sum all absolute deviations

$2 + 2 + 2 + 1 + 1 + 1 + 1 + 1 + 5 + 6 = 22$

Step3: Calculate MAD (average deviation)

$\text{MAD} = \frac{\text{Sum of absolute deviations}}{\text{Number of data points}} = \frac{22}{10}$

Answer:

2.2