1.7 variation and correlation

Presentation

•

Mathematics

•

11th Grade

•

Practice Problem

•

Hard

•

CCSS

6.NS.B.3, HSS.ID.B.6B, HSS.ID.B.5

Standards-aligned

Erin Martin

FREE Resource

6 Slides • 9 Questions

What is R²?

Match

Strong correlation

Bad correlation

Always positive

Able to change

1 and -1

R²

variable

Multiple Choice

What was the black horizontal line on the graph?

mean

variance

maximum

minimum

weight

Multiple Choice

Why is the difference between each data point and the mean squared?

So negative differences do not cancel out the positive ones

So the differences will be larger than the mean

So the differences will be larger than the maximum and the mean

So any errors will not be larger than the variance and the mean

Multiple Choice

What is the correlation between mouse size and weight?

positive

negative

no correlation

Multiple Choice

Is the mean weight the best way to predict a mouse's weight?

Yes

Drag and Drop

R² ranges from

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-1

Drag and Drop

Based on the quotient equation given for R², it is a

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percentage

variance of the maximum

number below the mean

number above the mean

Drag and Drop

If R² is 0.75, then the relationship between the two variables explains

of the variation of the data.

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75%

0.75%

7.5%

100%

25%

Drag and Drop

An R² value of 0.01 means that the relationship between the variables

explain the variation in the data.

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probably does not

definitely will

has 100% chance of being able to

has 99% chance of being able to

What is R²?

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