Question

here the qustion

Answer 1

I've answered this question on here already and similar questions hmm

But since they're always in screenshots, I can't find those previous posts. So I'll just type out the question


The two dot plots below compare the forearm length of two groups of school children:
Forearm Length, Group A

Forearm Length, Group B
Based on visual inspection of the dot plots, which group appears to have the longer average forearm length?

A. Group B, because seven children have a forearm length longer than 10 inches
B. Group B, because three children in the group have the least forearm length of 9 inches
C. Group A, because three children in the group have the least forearm length of 9 inches
D. Group A, because two children have a forearm length longer than 10 inches

Answer 2

So here's the concept and I'm going to make up an example for you

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?

If you can't tell based off the graph, just manually calculate the average. Add up all the numbers and divide by how many numbers there are in the list

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