OG详解-OG9 数学1 Q6

The correct answer is 9. The mean of a data set is the sum of the values in the data set divided by the number of values in the data set. It follows that the mean height, in centimeters, of these plants is the sum of the heights, in centimeters, of each plant, 6+10+13+2+15+22+10+4+4+4, or 90, divided by the number of plants in the data set, 10. Therefore, the mean height, in centimeters, of these plants is9010​​ , or 9.