Mmm looks like a test. I don't know if we should be answering this.
Answer:
is wrong，6/20,3/10
Step-by-step explanation:
Answer: 45
Step-by-step explanation:
The Median is the Middle # in the set.
I hope this helps!
It is not possible to select a single group from the primary school, since being a single group it could not in any way represent the entire primary school.
Choosing a group would provide the average height for that group, not the entire primary.
Assumptions can be made that the course of half of the primary would theoretically give us a more accurate representation, but the objective is to select a number of students from each course and there would be a representative sample of the entire primary.
