Find the median of each student group, (tenth if needed) and find their difference in medians.

Can you please do it like a 7th grader?

Sure! Let's first find the median of each student group.

Group 1: 10, 12, 15, 18, 20
To find the median, we first need to put the numbers in order: 10, 12, 15, 18, 20
The middle number is 15, so the median for Group 1 is 15.

Group 2: 8, 10, 12, 16, 18, 20
Putting the numbers in order: 8, 10, 12, 16, 18, 20
Since there are 6 numbers, the median is the average of the two middle numbers: (12 + 16) / 2 = 14
So the median for Group 2 is 14.

Now, let's find the difference in medians:
15 (median of Group 1) - 14 (median of Group 2) = 1

So the difference in medians between the two student groups is 1.