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 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. CorrelationPositiveOutlierNo outlierNegativeOutlierNo outlier No Correlation

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 GPAHours 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 well Ask a survey question that doesn’t use opinions

Label Your Data Collection Paper Your survey question goes here Independent variable goes hereDependent 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 hereDependent 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!

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 Plot Pre-TestPost-Test 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 Conclusions Describe 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