Find the rate of change.

Not a constant slope/Non-Linear

Some data were collected on the weight of a male white laboratory rat for the first 25 weeks after its birth. The linear regression equation is: Weight = 100 + 40(Time). Which is the best description of the slope for this regression equation in context of the problem?

The slope is 40 grams/week which means the mouse gains about 40 grams per week after birth.

The slope of the line of regression is the time since birth of the rate. It demonstrates the predicted weight of a laboratory rate after so many months since birth.

The slope is 40 and it means for every increase in weeks the graph will increase.

The slope is 40, which tells us the line increases.

Which is the best description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?

The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth.

The y-intercept is 100, which is where the graph crosses the y-axis.

100 is where the data starts on the y-axis.

The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds.

Write the linear regression equation for the data set foot length (x) and height (y).

height = 117.99 + 1.878(foot length)

height = 28.39(foot length) + 1.155

Interpret the slope of the Least Squares Line Equation.

As hours increases by one, income will increase by 31.45.

Income increases by 31.45 with each additional 2 hours worked.

As hours increases by one, income will decrease by 242.3.

AP Stats 3.1-3.3 Regression & Correlation (Stats in Action) Quiz

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the relationship between the variables.

no correlation

strong positive correlation

strong negative correlation

weak positive correlation

Tags

CCSS.5.G.A.2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the correlation in the graph shown.

Strong Negative

Strong Positive

Weak Negative

Weak Positive

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the correlation in the graph shown.

Strong Negative

Strong Positive

Weak Negative

No Correlation

Tags

CCSS.HSF-LE.A.1B

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the correlation in the graph shown.

Strong Negative

Strong Positive

Weak Negative

Weak Positive

Tags

CCSS.2.MD.D.9

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Estimate the correlation coefficient.

r=0

r=-1

r=1

r=2

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

12 chapters

15 chapters

18 chapters

21 chapters

Tags

CCSS.HSS.ID.B.6

CCSS.HSA.CED.A.2

CCSS.HSF.IF.B.4

CCSS.HSS.ID.C.7

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If Joe worked 30 hours, how much is he expected to earn?

$600

$200

$1000

$800

Tags

CCSS.HSA.SSE.A.1

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

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AP Stats 3.1-3.3 Regression & Correlation (Stats in Action)

Describe the relationship between the variables.

Describe the correlation in the graph shown.

Describe the correlation in the graph shown.

Describe the correlation in the graph shown.

Estimate the correlation coefficient.

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

If Joe worked 30 hours, how much is he expected to earn?

Find the rate of change.

If Gold's Gym is looking to buy 30 TVs, how much will each one cost?

The table shown is comparing a person's foot length to their height in cm. Calculate the regression equation

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