2/16 REVIEW UNIT 3 LESSONS 1-6

Multiple Choice

How many more children prefer playing cricket than netball?

• 1

• 7

• 6

• 5

Multiple Choice

The two-way table shows what food and/or drink customers bought from a stall. How many people bought only one item?

• 10

• 20

• 0

• 30

Multiple Choice

The table shows incomplete info about customers' orders in a cafe. How many women visited the cafe in total?

• 37

• 15

• 22

• 12

Fill in the Blanks

Of the people surveyed, what is the relative frequency of people who floss regularly as a ratio?

Fill in the Blanks

Of the people surveyed, what is the relative frequency of people who floss regularly as a percent?

Fill in the Blanks

Does there seem to be a relationship between people who own a gym membership and people who floss regularly? Explain.

Fill in the Blanks

Does there seem to be any association between people who have kids and people who have pets? Explain.

Open Ended

Give an example of when scatterplots would be useful outside of the classroom.

Multiple Choice

Which graph best shows a positive correlation between the number of hours studied and the test scores?

• Graph A

• Graph B

• Graph C

• Graph D

Multiple Choice

CLICK the picture for easier reading. What statements are true?

• A scatter plot is a graph that uses points to display the relationship between two different sets of data

• The x-axis represents the AGE of the trees.

• The y-axis represents the diameter (thickness) of the tree.

• ALL OF THE ANSWERS ARE TRUE!

Multiple Choice

What does the blue point represent?

• 5 books weighs 6 pounds.

• 1 book weighs 2 pounds

• 6 books weigh 5 pounds

• what are books?

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Multiple Choice

A teacher made the following graph showing absences vs. final grades. Predict the grade of a student that has 7 absences.

• 50

• 45

• 70

• 60

Multiple Choice

A teacher made the following graph showing the number of hours that a student studied for an exam versus their exam grade.

Predict the grade of a student if they studied for 3.5 hours

• 80

• 100

• 95

• 90

Residual

​Residual = Actual y - Predicted y

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

Multiple Choice

$$y-hat=113.6-0.921x$$  models the relationship between x=the height of a student in inches and y=the number of steps to walk the length of a hallway. Calculate the residual for a person who is 63 inches tall and takes 59 steps.

• 3.423

• -3.423

• 5.436

• -5.436

Bad Residual Plots

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

​https://phet.colorado.edu/sims/html/least-squares-regression/latest/least-squares-regression_en.html

Multiple Choice

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES

• NO

Multiple Choice

Would the linear model be appropriate?

• YES

• NO