How to find correlation - AP Statistics
Card 1 of 24
Which of the following correlation coefficients indicates the strongest relationship between variables?
Which of the following correlation coefficients indicates the strongest relationship between variables?
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Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
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A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is 
.
-The correlation between the number of texts sent each day and the number of books read each month is 
.
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is
-The correlation between the number of texts sent each day and the number of books read each month is
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
Tap to reveal answer
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger. 
is a stronger correlation than 
.
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger.
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Which of the following shows the least correlation between two variables?
Which of the following shows the least correlation between two variables?
Tap to reveal answer
The strength of correlation is measured on an absolute value scale of 
to 
with 
being the least correlated and 
being the most correlated. The positive or negative in front of the correlation integer simply determines whether or not there is a positive or negative correlation between the variables.
A correlation of 
means that there is no correlation at all between two variables.
The strength of correlation is measured on an absolute value scale of
A correlation of
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In a medical school, it is found that there is a correlation of 
between the amount of coffee consumed by students and the number of hours students sleep each night. Which of the following is true?
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
In a medical school, it is found that there is a correlation of
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
Tap to reveal answer
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of 
to 
on an absolute value scale of 
to 
is considered to be a strong correlation. Statement iii is incorrect since correlation does not mean causation.
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of
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It is found that there is a correlation of exactly 
between two variables. Which of the following is incorrect?
It is found that there is a correlation of exactly
Tap to reveal answer
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
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Which of the following correlation coefficients implies the strongest relationship between variables:
Which of the following correlation coefficients implies the strongest relationship between variables:
Tap to reveal answer
A high correlation coefficient regardless of sign implies a stronger relationship. In this case 
has a stronger negative relationship than the positive relationship described by a value of 
A high correlation coefficient regardless of sign implies a stronger relationship. In this case
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Which of the following correlation coefficients indicates the strongest relationship between variables?
Which of the following correlation coefficients indicates the strongest relationship between variables?
Tap to reveal answer
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
← Didn't Know|Knew It →
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is .
-The correlation between the number of texts sent each day and the number of books read each month is .
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is
-The correlation between the number of texts sent each day and the number of books read each month is
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
Tap to reveal answer
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger. is a stronger correlation than .
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger.
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Which of the following shows the least correlation between two variables?
Which of the following shows the least correlation between two variables?
Tap to reveal answer
The strength of correlation is measured on an absolute value scale of to with being the least correlated and being the most correlated. The positive or negative in front of the correlation integer simply determines whether or not there is a positive or negative correlation between the variables.
A correlation of means that there is no correlation at all between two variables.
The strength of correlation is measured on an absolute value scale of
A correlation of
← Didn't Know|Knew It →
In a medical school, it is found that there is a correlation of between the amount of coffee consumed by students and the number of hours students sleep each night. Which of the following is true?
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
In a medical school, it is found that there is a correlation of
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
Tap to reveal answer
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of to on an absolute value scale of to is considered to be a strong correlation. Statement iii is incorrect since correlation does not mean causation.
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of
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It is found that there is a correlation of exactly between two variables. Which of the following is incorrect?
It is found that there is a correlation of exactly
Tap to reveal answer
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
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Which of the following correlation coefficients implies the strongest relationship between variables:
Which of the following correlation coefficients implies the strongest relationship between variables:
Tap to reveal answer
A high correlation coefficient regardless of sign implies a stronger relationship. In this case has a stronger negative relationship than the positive relationship described by a value of
A high correlation coefficient regardless of sign implies a stronger relationship. In this case
← Didn't Know|Knew It →
Which of the following correlation coefficients indicates the strongest relationship between variables?
Which of the following correlation coefficients indicates the strongest relationship between variables?
Tap to reveal answer
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
← Didn't Know|Knew It →
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is .
-The correlation between the number of texts sent each day and the number of books read each month is .
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is
-The correlation between the number of texts sent each day and the number of books read each month is
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
Tap to reveal answer
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger. is a stronger correlation than .
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger.
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Which of the following shows the least correlation between two variables?
Which of the following shows the least correlation between two variables?
Tap to reveal answer
The strength of correlation is measured on an absolute value scale of to with being the least correlated and being the most correlated. The positive or negative in front of the correlation integer simply determines whether or not there is a positive or negative correlation between the variables.
A correlation of means that there is no correlation at all between two variables.
The strength of correlation is measured on an absolute value scale of
A correlation of
← Didn't Know|Knew It →
In a medical school, it is found that there is a correlation of between the amount of coffee consumed by students and the number of hours students sleep each night. Which of the following is true?
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
In a medical school, it is found that there is a correlation of
i. There is a positive association between the two variables.
ii. There is a strong correlation between the two variables.
iii. Coffee consumption in medical school students causes students to sleep less each night.
Tap to reveal answer
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of to on an absolute value scale of to is considered to be a strong correlation. Statement iii is incorrect since correlation does not mean causation.
Since the correlation is negative, there must be a negative association between the two variables (therefore statement i is incorrect). Statement ii is correct since a correlation of
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It is found that there is a correlation of exactly between two variables. Which of the following is incorrect?
It is found that there is a correlation of exactly
Tap to reveal answer
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
Under no circumstance will correlation ever equate to causation, regardless of how strong the correlation between two variables is. In this case, all other answer choices are correct.
← Didn't Know|Knew It →
Which of the following correlation coefficients implies the strongest relationship between variables:
Which of the following correlation coefficients implies the strongest relationship between variables:
Tap to reveal answer
A high correlation coefficient regardless of sign implies a stronger relationship. In this case has a stronger negative relationship than the positive relationship described by a value of
A high correlation coefficient regardless of sign implies a stronger relationship. In this case
← Didn't Know|Knew It →
Which of the following correlation coefficients indicates the strongest relationship between variables?
Which of the following correlation coefficients indicates the strongest relationship between variables?
Tap to reveal answer
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
Correlation coefficients range from 1 to -1. The closer to either extreme, the stronger the relationship. The closer to 0, the weaker the relationship.
← Didn't Know|Knew It →
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is .
-The correlation between the number of texts sent each day and the number of books read each month is .
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
A national study on cell phone use found the following correlations:
-The correlation between the number of texts sent each day and a person's average credit card debt is
-The correlation between the number of texts sent each day and the number of books read each month is
Which of the following statements are true?
i. As the number of texts sent each day increases, average credit card debt increases.
ii. Sending more texts causes people to read less.
iii. A person's average credit card debt is related more strongly to the number of texts sent each day than the number of books read each month is related to the number of texts sent each day.
Tap to reveal answer
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger. is a stronger correlation than .
i is correct because there is a positive correlation between the number of texts sent each day and average credit card debt.
ii is incorrect because the word "cause" was used in the statement. Correlation does not mean causation. There is a relationship between the number of texts sent each day and the number of books that a person reads each month. However, the number of texts sent each day does not cause a person to read a certain number of books each month.
iii is correct because the absolute values of the correlations indicate which correlation is stronger.
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