Finding the Mean of Data

Find the mean:
9, 9, 3, 2, 8, 7, 4 

• 49

• 6

• 9

• 7

Find the mean of these numbers:
2, 57, 38, 42, 6

• 29

• 38

• 50

• 145

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99.What was the average score for these students? _________

• 91

• 273

The 5th grade class was in charge of the dinosaur exhibit at the school science fair. Jason brought21 dinosaur models, Lisa brought 13 dinosaur models, Sara brought 6 dinosaur models, and Jimbrought 24 dinosaur models.What is the average number of dinosaur models that each student brought to the fair? _________

• 24

• 16

• 6

• 4

What is the mean of the data set:
8.9, 9.4, 8.6, 9.1

• 8.5

• 8.9

• 9

• 9.1

How do you find the average of a data set?

• Add them all up and divide by how many numbers there are

• List in order from least to greatest

• Add the numbers and subtract the largest number

• Find the repeated numbers

Find the mean of the data set:
34, 57, 58, 56, 21

• 45.2

• 56

• none

• 48

Another name for the "mean"

• Middle number

• Average

• Number that repeats the most

• Rude

If my data set had an outlier that was quite a bit more than the other numbers in my data set, what would it do to my average

• leave it the same

• increase the average

• decrease the average

Find the mean of each grouped data using the class marks: Heights of G-7 Diamond

• 148.90

• 156.88

• 160.90

• 154.08