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Statistics and Graphing: Bivariate Data

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Questions and Answers

What can be concluded about the relationship between the two quantities if the correlation coefficient is 0.91?

There is a weak relationship between the two quantities.

There is an unpredictable relationship between the two quantities.

There is a strong relationship between the two quantities. (correct)

There is no relationship between the two quantities.

What type of correlation is represented by the scatter plot with a strong positive correlation?

C (correct)

What is the purpose of computing the Pearson coefficient r?

To determine the equation of the line of best fit.

To determine the y-intercept of the line of best fit.

To determine the strength of the linear relationship. (correct)

To determine the slope of the line of best fit.

What can be concluded about the variables of the study if the Pearson coefficient r is close to 1?

The variables have a strong positive relationship. Signup and view all the answers

What is the relationship between the age of the gravestone and the diameter of the lichen?

As the age of the gravestone increases, the diameter of the lichen increases. Signup and view all the answers

What is the purpose of the study involving the number of bacteria and their ages?

To determine the relationship between the number of bacteria and their ages. Signup and view all the answers

What can be concluded about the number of bacteria and their ages if the correlation coefficient is close to 1?

The number of bacteria increases as their ages increase. Signup and view all the answers

What is the interpretation of a scatter plot with a strong positive correlation?

As one variable increases, the other variable also increases. Signup and view all the answers

What is the main difference between a strong positive correlation and a strong negative correlation?

The direction of the relationship. Signup and view all the answers

What is the purpose of Pearson's correlation coefficient?

To measure the strength and direction of the linear relationship between two variables. Signup and view all the answers