Question

Uri asked six friends how many different foreign countries theyÍd been to. He recorded 0, 1, 1, 2, 5, and 9 countries visited.

What is the mean absolute deviation of the number of countries visited? Round to the nearest tenth, if needed.









A.

0 countries








B.

2.7 countries








C.

2.9 countries








D.

3 countries

Answer 1

2.7

Explanation:

Answer 2

MAD = Σ|x - mean|/n
mean = (0 + 1 + 1 + 2 + 5 + 9)/6 = 18/6 = 3

MAD = (|0 - 3| + |1 - 3| + |1 - 3| + |2 - 3| + |5 - 3| + |9 - 3|)/6 = (3 + 2 + 2 + 1 + 2 + 6)/6 = 16/6 = 2.7 countries.