To Begin:

• Log on and visit my blog• Go to April 17th and download the PowerPoint

slides there• Read through the slides here and answer

questions in your notes

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Scatter Plots and Statistics

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Warm-Up

• In English you talked about different techniques people can use to persuade others.

• Name some now:

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Warm-Up

• In English you talked about different techniques people can use to persuade others.

• Name some now:Bandwagon Technique

Exaggeration

Snob Appeal

Testimonial

Emotional Appeal

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Purpose of the Unit: Think about the Warm-Up

• Purpose of the warm-up:Many of the persuasive choices you make in English can be made in presenting math as well

• Purpose of the unit: This unit will help you to think logically about the information you are presented with, determine if it is a fair picture of the data, and create your own statistics from questions you create.

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Where are we going in this unit?• Day 1: Overview (today)• 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

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Overview Day: Master the Basics

• SWBAT form excellent quantitative questions• SWBAT choose appropriate scales for graphs• SWBAT identify independent and dependent

variables

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Vocab Reminder

• Qualitative: Data that deals with qualitiesExample: Color of your hair

• Quantative:Data that deals with numbersExample: Size shoes you wear

• Correlation: Data that “goes together”. One affects the other, or they move together.

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For this unit, we need 2 sets of data that are correlated

• Let’s think of questions that “go together”, or questions where the data will be related, like– What is your shoe size and your height?– How much did you study and what was your

recent test score?– How much TV do you watch and what is your

average homework percentage?

• List 2 more in your notes

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Quantitative Questions

• For this unit we are going to focus on quantitative question sets only because they are easier to graph since they use numbers.

• Brainstorm 3 quantitative questions (must be different from before)

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Independent vs. Dependent

• Independent: Data that is not affected by anything else. It is the variable being changed. X-values.

• Dependent: Data that is being measured. It DEPENDS on the independent data. Y-values.

Example: Grade on exit ticket and test score

independent dependent

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Independent vs. Dependent

• Go back to your list of qualitative questions and label one as the “independent” and the other as the “dependent” variable.

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Selecting A Scale

• Before you can avoid things like exaggeration in English class, commercials or ads, you need to know a little bit about your subject.

• Same with math. Before you can avoid being tricked by misleading data, you need to understand how to represent data appropriately

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Selecting A Scale

Height 60” 54” 67” 48” 50” 52”

Weight 135 lbs 120 lbs 190 lbs 110 lbs 109 lbs 100 lbs

Directions: Look at the table below. What is the independent variable? The dependent variable?

What is the lowest value of the independent variable? What is the highest value of the independent variable?

What is the lowest value of the dependent variable? What is the highest value of the dependent variable?

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Selecting A Scale• When you select your scale, you are going to use these

same steps.1. Identify the lowest value of your independent variable. This

is the low value of your x-axis2. Identify the highest value of your independent variable.

This is the highest value of your x-axis3. Identify the lowest value of your dependent variable. This is

the low value of your y-axis.4. Identify the highest value of your dependent variable. This

is the highest value of your y-axis.THEN5. Choose an amount to move by so your graph doesn’t take

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Selecting a Scale

Independent: Height—lowest: 50, highest: 67Dependent: Weight—lowest: 100, highest: 190

Weight:Moving by 50’s made sense for the y-axis

Height: Moving by 20’s made sense for the y-axis

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Selecting a Scale

• Select the appropriate scale for the graph below by following the steps listed on the previous page. Graph the data on your graph.

Number of cats

10 4 1 3 6 2

Number of mice

1 4 12 5 3 8

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Think you got it?

Make sure you can:•SWBAT form excellent quantitative questions•SWBAT choose appropriate scales for graphs•SWBAT identify independent and dependent variablesBe able to define:•Correlation, qualitative, quantitative, independent, dependent

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Quiz Yourself

• When you are sure you know your stuff, visit the link below and take the quiz.

https://docs.google.com/forms/d/1F0hxb_wOFzsKvbmJO62RLgLQ3BlbVN2yydCOjBHURyA/viewform?pli=1

• This counts as your classwork for the day, so do your best!

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