Free Printable Stats - Correlation Coefficient and Line of Best Fit

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Stats - Correlation Coefficient and Line of Best Fit

Total questions: 13

Worksheet time: 25mins

Name

Class

Date

What would be the equation for the line of best fit?

y=3/4x+9

y=-1/2x+9

y=-3/4x-9

y=-3/4x+9

Estimate the correlation coefficient for this scatterplot.

A) r = 1.2

B) r = 0.89

C)r = 0

D) r = -0.89

Describe the relationship between the variables.

A) Weak negative correlation

B) Moderate negative correlation

C) Moderate positive correlation

D) Strong negative correlation

Which colored line is the line of best fit?

A) Black

B) Orange

C) Red

D) Blue

What type of correlation does this graph show?

A) Positive

B) negative

C) none

D) all of the above

Which sentence describes the relationship shown on this scatter plot?

As the temperature decreases, the visitors increase.

As the temperature increases, the number of visitors increases.

As the visitors increase, the temperature decreases.

No correlation

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

Strong positive

Weak positive

Strong negative

Weak negative

Determine the correlation coefficient of the given data:

.9820

-.9643

1.409

.6864

Which equation best represents the data in the table?

y = -13x + 143

y = 13x + 143

y = 143x + 13

y = .996x + .998

10.

What is the correlation coefficient for the data?

-1

.9967

.9984

11.

If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit?

There is a weak, positive relationship

There is a strong, positive relationship

There is a weak, negative relationship

There is a strong, negative relationship

12.

Which statement best represents this relationship?

There is no relationship between the number of miles driven and the amount of gas remaining in the tank

As the number of miles driven increases, the amount of gas remaining in the tank increases.

As the number of miles driven increases, the amount of gas remaining in the tank decreases.

A relationship cannot be determined from this scatter plot

13.

What type of correlation (association)?
The outside temperature and the amount of layers you wear.

Positive correlation

Negative correlation

No correlation

100 %

Stats - Correlation Coefficient and Line of Best Fit

Total questions: 13

Worksheet time: 25mins

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