Question

The dot plots below show the ages of students belonging to two groups of painting classes:

A dot plot shows two divisions labeled Group A and Group B. The horizontal axis is labeled as Age of Painting Students in years. Group A shows 1 dot at 9, 7 dots at 10, 8 dots at 15, 8 dots at 17, and 6 dots at 19. Group B shows 6 dots at 10, 5 dots at 14, 6 dots at 18, 5 dots at 25, 4 dots at 28, and 4 dots at 29.

Based on visual inspection, which group most likely has a lower mean age of painting students? Explain your answer using two or three sentences. Make sure to use facts to support your answer.

Answer 1

do you want me to put up a pic ?

Answer 2

So let's say, I have two groups of numbers

Group A has the numbers
10, 10, 10, 11, 11, 11, 12, 12, 12

and Group B has the numbers
1, 1, 1, 2, 2, 2, 3, 3, 3

can you calculate the mean for both of these groups?

Remember to calculate it, you add up all the numbers and divide by how many numbers there are

and if we were to plot out the numbers

Answer 3

so based on this example I just gave you with those numbers, can you see which graph has the higher mean based on where the numbers are plotted?

Answer 4

So can you use that to answer your question?

Which one would have a higher mean?
It's going to be the one that has the larger numbers