The difference in the average age of the sample and the population is probably due to sampling error
What is sampling error?
The sampling error in a statistical data is simply an error that arises when a sample that represents the population is not properly selected or analyzed
From the question, we have the following parameters:
[tex]\bar x = 21.2[/tex] -- the sample average
[tex]\mu = 19.4[/tex] -- the population average
Notice that:
[tex]\bar x \ne \mu[/tex]
i.e. sample and the population averages are not equal.
This difference is often as a result of sampling error
Read more about sampling errors at:
https://brainly.com/question/19264268
