The arithmetic average describes the average trend of a set of data and is the quotient of the sum of all data divided by the number of data. When used in statistics, it should be noted that when there are extreme values, ambiguous data or different quality data, the arithmetic average can not be calculated.
According to the above definition, which of the following options is suitable for calculating arithmetic averages?
According to the statistics of the average height of teenagers in a certain school, all the students in the preschool, primary and secondary departments of the school are taken into account.