find the slope of this line.

Hand backTESTS!

i-can …today’s objective is a mystery!

i-can determine which has a positive linear association with clustering.

Page XX of your INB

the “ZONE”

Make a plan to

stay in the zone!

ITEMS of BUSINESS

REWORK is due NEXT TIME.

Last day to retake Ch 11 test is Thursday April 30. Must have practice test & rework done to retake.

Ch 16 test will be on Tues/Wed May 4/5.SAGE Test will be on May 14/15 & 18/19. BE HERE.

Questions on Homework?

i-can determinewhich has a positive linear association with clustering.

Get into your Groups

CHAPTER 16

VOCAB

ORGANIZER

Pages XX of your INB

BIVARIATE DATA

16.1 Scatterplots

Per Capita Income

% o

f pe

ople

wit

h a

coll

ege

degr

ee

I can’t shut my eyes!! What’s causing this?

STORY

Simple. Your hair is too long.The weight of it keeps your eyelids from closing..

CUT YOUR HAIR.

Once upon a time . . . a girl went to the doctor.

anm

. . . is there an association between hair length and blink-time?

I wonder . . .

Could one affect the other?Should I cut my hair?

do this:Measure your HAIR LENGTH.Use inches.

Measure your BLINK TIME.Use seconds.

Write it down!

TASK 1

Hold your eyes open for as long as you can without blinking.

Time it. That’s your blink time. One try.

When called on, say your measurements.

(HAIR LENGTH, BLINK TIME)

In that order.

CLICK HERE to graph the data

Make a graph.

Should she cut her hair?

Is there an association?

Does one depend on the other?

Do you think a scatterplot is good for showing this data?

No association

Yep. Perfect.

No mutual dependence

do this:Measure your hand.Measure your foot.

Use centimeters.Write it down.In that order.

HURRY.

TASK 1

Decimals OK.

. . . is there an associationbetween hand/foot size?

I wonder . . .

. . . does one dependon the other? Do they affect each other?

When called on, say your measurements. (HAND, FOOT) In that order.

CLICK HERE to graph the data

Make a graph.

Were you right?

Is there an association?

Does one depend

on the other?

Describe the association.

Yes Association

Positive

Not really.

Linear

CHAPTER 16 VOCAB ORGANIZER

FOLLOW ALONG

DEPENDENT vs. INDEPENDENT

Does __________ depend on ________________?

Dep

end

ent

Or do _______________ depend on _________?

Independent

cost pounds

costpounds

y axis

x axis

cause

cause

DEPENDENT vs. INDEPENDENT

The variable whose valueis determined by, or caused by the other.

You may not choose this value.

The variable whose valuedoes not rely on the other.

You may choose this value.

Dependent Variable Independent Variable

xy

ASSOCIATION vs. NO ASSOCIATION

Points seem to stay close together and follow the same direction.

Points are scattered.Points have NO direction.

Association No association

CLUSTERING vs. OUTLIERS

CLUSTERING: Most points fall within a defined space.

Loose clustering Tight clustering Perfect clustering

OUTLIERS: Points outside that defined space. They are often disregarded. Sad, but true.

POSITIVE vs. NEGATIVE association

Both are increasing.

*They AGREE with each other!

POSITIVE NEGATIVEOne increases,

the other decreases.

*They OPPOSE each other!

+

+-

+

LINEAR vs. NON-LINEAR

Follows a STRAIGHT line.

* Remember, “lines” in mathare straight.

LINEAR NON-LINEAR

Does NOT follow a straight line.

Therefore NOT-linear.

Day 1 – Integer operations, PEMDAS, evaluating16.1 Scatterplots

i-can

See problems 11-16 on your homework

determinewhich has a positive linear association with clustering.

Worksheet16.1

Scatterplots