Final answer:
The average (mean) IQ of the 22,000 students is called the sample mean.
Step-by-step explanation:
The average (mean) IQ of the 22,000 students is called the sample mean.
In statistics, the sample mean is the sum of all the IQ scores divided by the total number of students.
It gives us an idea of the central tendency or average intelligence level in the sample. To calculate the sample mean, we add up all the IQ scores and divide by the total number of students.
For example, if the total sum of IQ scores for the 22,000 students is 1,000,000, then the sample mean would be 1,000,000 / 22,000 = 45.