Calculate the Correlation Coefficient of the following table.

r= 1 perfect straight increasing line

r= 1 perfect straight decreasing line

Which best represents no correlation?

the amount of tea that is drank and level of intelligence.

the temperature and what people wear outside.

how much you study and your grades.

where you signed up for a cell phone plan and your area code.

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

B) The more books students read, the higher their English grade.

A) The more books students read, the lower their English grade.

C) The fewer books students read, the higher their English grade.

D) No relationship exists between the number of books students read and their English grades.

Data is collected comparing sales of cars and the age of the salesperson. After analyzing the data, it is determined that the correlation coefficient is 0.19. What does this mean?

There is no correlation between sales and age.

There is a strong positive correlation between sales and age.

There is a strong negative correlation between sales and age.

There is a weak negative correlation between sales and age.

Data is collected comparing minutes of exercise each day and blood pressure. It is determined that the correlation coefficient is -0.87. What does this mean?

There is a strong negative correlation between exercise and blood pressure.

There is a weak negative correlation between exercise and blood pressure.

There is a strong positive correlation between exercise and blood pressure.

There is no correlation between exercise and blood pressure.

Which statement best represents this relationship?

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

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.

A relationship cannot be determined from this scatter plot

What does a correlation coefficient describe?

The strength of the relationship between two sets of data

The equation of a straight line

The amount of scatter in a scatter plot

The number of variables in bivariate data

What does a positive correlation indicate?

Both sets of data values increase together

One set of data increases as the other set decreases

There is no relationship between the two sets of values

The scatter plot is scattered all over the place

Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.92. What does this mean?

There is a strong positive correlation between studying and grades.

There is a strong negative correlation between studying and grades.

There is a weak positive correlation between studying and grades.

There is a weak negative correlation between studying and grades.

Data is collected comparing sales of cars and the age of the salesperson. After analyzing the data, it is determined that the correlation coefficient is 0.19. What does this mean?

There is no correlation between sales and age.

There is a strong positive correlation between sales and age.

There is a strong negative correlation between sales and age.

There is a weak negative correlation between sales and age.

What is the correlation between length of running start and distance of jump?

positive: the further you run the further you jump

negative: the less you run the less distance of your jump

positive: the further your running start the less your distance

Which sentence describes the relationship shown on this scatter plot?

As the time spent training increases, the time to run 100 m decreases.

The more time spent training, the longer it takes to run 100 m.

As the time spent training decreases, the time to run 100 m decreases.

Quizizz: 6.2 A Correlation Coefficient

Authored by Holly Long

Mathematics

8th - 9th Grade

CCSS covered

Used 12+ times

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57 questions

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Estimate the correlation coefficient for this scatterplot.

A) r = -0.9

B) r = 1

C) r = 0.9

D) r = -1

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What type of correlation does this graph show?

A) Positive

B) negative

C) none

D) all of the above

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Describe the correlation.

Negative correlation

No correlation

Positive correlation

Constant correlation

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What type of correlation does this graph have?

Positive correlation

Negative correlation

No correlation

Constant correlation

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What type of correlation does this scatter plot show?

Positive correlation

Negative correlation

No correlation

Constant correlation

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Estimate the correlation coefficient

r = 1

r = -1

r ≈ -0.8

r ≈ 0.8

r ≈ -0.5

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A perfect negative correlation has a correlation coefficient of ____.

-1

Tags

CCSS.HSS.ID.C.8

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Quizizz: 6.2 A Correlation Coefficient

Estimate the correlation coefficient for this scatterplot.

What type of correlation does this graph show?

Describe the correlation.

What type of correlation does this graph have?

What type of correlation does this scatter plot show?

Estimate the correlation coefficient

A perfect negative correlation has a correlation coefficient of ____.

A perfect positive correlation has a correlation coefficient of ____.

Which graph represents data that has a correlation coefficient close to -1?

Select all the values for r that indicate a positive slope for the line of best fit.

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