Anna asked her classmates how many pets they have. This line plot shows the results. Find the MEAN number of pets.
Process: Each x represents a number. Write down the numbers that the x's represent. Add the numbers together. Divide by the number of x's. Remember, "0" still counts as a number!
numberline goes from 1 to 10
0=3 x's
1= 4 x's
2= 2 x's
3= 6 x's
4= 2 x's
5 = none
6= none
7 = none
8 = none
9 = 1 x
10 = none
Calculating the mean number of pets:
(0 x 3) + (1 x 4) + (2 x 2) + (3 x 6) + (4 x 2) + (9 x 1) = 0 + 4 + 4 + 18 + 8 + 9 = 43
There are a total of 3 + 4 + 2 + 6 + 2 + 1 = 18 x's
Mean = 43 / 18 = 2.38
The mean number of pets is 2.38.