In 20 football matches a team's goals were recorded as — 0 goals in 4 matches, 1 goal in 6 matches, 2 goals in 5 matches, 3 goals in 3 matches, 4 goals in 2 matches. What is the median number of goals per match?

Build the running counts: 4, 10, 15, 18, 20. With n = 20 the median is the average of the 10th and 11th observations. The 10th is the last of the six 1-goal matches and the 11th is the first of the five 2-goal matches, so the median is (1 + 2)/2 = 1.5. The value 1.65 is the MEAN, 33 ÷ 20; 1 is the mode, since 1 goal is the commonest score; and 2 is the middle ROW of the table, which is not the same thing as the middle observation.