Warm-Up• Put homework at the end

of your table• Using the “Sample Data

Collection” paper, come up with a quantitative question you would like to collect data about FROM YOUR CLASSMATES

• Example: height and weight

• Fill in numbers 1-4

Looks

like thisLooks

like this

Scatter Plots & Statistics

11.4 Creating Scatter Plots

Where are we going?• Day 1: Overview • Day 2: Misleading Data• Day 3: Reading Scatter Plots• Day 4: Creating Scatter Plots• Day 5: Solve for the Equation of a Trend Line• Day 6: Solve for the Equation of a Trend Line and

Judge Fit• Day 7: Predict Future Values from Scatter Plots• Review• Test: May 2nd

Daily Objectives

• SWBAT create a scatter plot given a table of values

• SWBAT Draw in a line of best fit (trend line)• SWBAT create quantitative survey questions,

collect data, and display as a scatterplot

Corrections: Exit Ticket 11.3• Clarifier: Outliers are NOT a type of

correlation. Outliers describe data that does not fit with the normal trend.

Return to the Warm-Up

• Things to keep in mind:– (R) our sample is not random, so ask a question

that is best answered by OUR CLASSMATES, not the entire population• Ex) ask “what is the height and weight of Ms.

Keating/Ramsel’s homeroom” not “what are the heights and weights of middle school students?”

• Fix it now if you need

Return to Warm-Up

GPA Hours spent on homework per night

Quantitative means “numbers data”. My data is measured in numbers. Qualitative means “qualities data”. My data is not qualitative because it doesn’t measure qualities.

What are the GPA’s and hours spent on homework of students in Ms. Keating/Ms. Ramsel’s homeroom?

Ask everyone in the class, not just people I know really wellAsk a survey question that doesn’t use opinions

Label Your Data Collection Paper

Your survey question goes here

Independent variable goes here Dependent variable goes here

What are the GPA’s and the hours spent on homework per night of students in Ms. Keating/Ms. Ramsel’s classes?

Hours spent on Homework GPA

Set this aside for now…

Your survey question goes here

Independent variable goes here Dependent variable goes here

What are the GPA’s and the hours spent on homework per night of students in Ms. Keating/Ms. Ramsel’s classes?

Hours spent on Homework GPA

Creating A Scatter Plot

• Scatter plot: a graph that shows data as points on a coordinate plane. Can be used to find trends/correlations in data.

Scatter Plot! Ta-da!

Scatter Plot! Ta-da!

Graphing Points from a Table• Remember, coordinates are listed (x, y) or

even better, (independent, dependent)• Move from a table to a graph by turning the

table into (x, y) coordinates Remember! Scale, title,

labels!

Practice Creating A Scatter PlotPre-Test Post-Test

80 90

76 83

82 86

66 81

75 78

85 93

88 94

70 72

70 75

Create the scatter plot from the table in your notes. Remember labels, title and scale!

Line of Best Fit/Trend Line

• Line of best fit: Describes the general correlation of the data. Half of the points should be above the line, half should be below. AKA, trend line

Trend line/Line of Best Fit

Return to your pre-test/post-test graph

• Add a line of best fit by making the line go through the center of the data, and have half above and half below.

• Go through specific points if you can.• Example:

6 points above the line

6 points below the line

Line connecting as many points as possible

Draw in a line of best fit on your scatter plot

Back to the Warm-Up!

• You are going to collect data from your classmates

• Leave your labeled tables at your seat and quickly and quietly fill in others’ tables with your information

• If you don’t want to answer their question, (Ex, you don’t want to write down your weight) write data that is reasonable, or skip their form

• When everyone’s tables are full, graph your data!

Writing ConclusionsDescribe what the correlation looks like, and what that means for the movement of the x and y variables.

My Question: GPA vs. Hours spent on homework per night

This data shows a positive correlation, which means that as students do more homework, they will most likely have a higher GPA

GPA

Hours on HW

Share Out• Share your conclusions from our class data

and teach us about our classmates!

Classwork

• There are several animal cards at your tables.• Choose data from the animal cards and create

scatter plots for each of the data sets you choose.

• Answer the questions about each set.

Finish Up

• Classwork• Exit Ticket• Homework