Multiple choice

The mean deviation of the numbers 1, 2, 3, 4, 5 is

  1. 0

  2. 1.2

  3. 2

  4. 1.4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mean = (1+2+3+4+5)/5 = 3. Mean deviation = (|1-3| + |2-3| + |3-3| + |4-3| + |5-3|) / 5 = (2+1+0+1+2) / 5 = 6/5 = 1.2.

AI explanation

The mean of the numbers is 1 plus 2 plus 3 plus 4 plus 5 divided by 5, which equals 3. The absolute deviations from this mean are 2, 1, 0, 1 and 2, and their sum is 6. We divide this total by 5 to obtain the mean deviation, which gives 1.2.

Keep practicing — related questions