Question 1

The strength of association between two variables is indicated by which statistical method?

Accepted Answer

The correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables.

Question 2

Which of the following statements is an accurate interpretation of the statistical result Pearson r = 0.70?

Accepted Answer

The Pearson correlation coefficient (r) of 0.70 indicates that 49% (0.70^2) of the variability in one variable is explained by the variability in the other variable.

Question 3

When one variable precedes the other in time and the correlation between them is high, which statement can be made with confidence?

Accepted Answer

A high correlation indicates a strong association between the two variables, but it does not imply causation or rule out the influence of extraneous variables.

Question 4

What does the statistic r²represent?

Accepted Answer

r², or the coefficient of determination, represents the proportion of the variance in the dependent variable that is predictable from the independent variable(s).

Question 5

What are the two dimensions that describe a relationship between two variables?

Accepted Answer

Direction and strength describe the relationship between two variables. Direction refers to whether the variables are positively or negatively related, while strength refers to the magnitude of the relationship.

Question 6

In correlational research when two variables have a very strong relationship, the Pearson r value will be near:

Accepted Answer

The Pearson r value ranges from -1 to 1, where values near 1 or -1 indicate a very strong relationship between the two variables.

Question 7

A nurse is reviewing results in a study measuring the correlation between pain and patients' activity level. The Pearson r of the association between the two variables is .66. What conclusions can the nurse make about the study results?

Accepted Answer

The answer of A nurse is reviewing results in a...

Question 8

When a small letter a (e.g., ^a) is beside a Pearson r statistic, what does it usually indicate?

Accepted Answer

The answer of When a small letter a (e.g., ^a)...

Question 9

In the exemplar study about depressive symptoms in patients with heart failure (Graven et al, 2014), which of the following significant relationships was found?

Accepted Answer

The study found a significant relationship between depressive symptoms and heart failure symptoms, indicating that patients with heart failure often experience depressive symptoms.

Question 10

What does a p-value of 0.08 mean?

Accepted Answer

A p-value of 0.08 indicates that there is an 8% probability that the observed data (or something more extreme) would occur if the null hypothesis were true, suggesting the finding could be due to chance.

Question 11

What does a negative correlation statistic value mean?

Accepted Answer

A negative correlation indicates that as one variable increases, the other variable tends to decrease, and vice versa.

Question 12

In a correlation study, the p value of a Pearson r statistic is 0.005. What does this mean?

Accepted Answer

A p-value of 0.005 indicates that there is a very small chance (0.5%) that the observed correlation is due to random chance, suggesting a statistically significant relationship between the variables.

Quiz 6: Correlational Research

The strength of association between two variables is indicated by which statistical method?

Which of the following statements is an accurate interpretation of the statistical result Pearson r = 0.70?

When one variable precedes the other in time and the correlation between them is high, which statement can be made with confidence?

What does the statistic r²represent?

What are the two dimensions that describe a relationship between two variables?

In correlational research when two variables have a very strong relationship, the Pearson r value will be near:

A nurse is reviewing results in a study measuring the correlation between pain and patients' activity level. The Pearson r of the association between the two variables is .66. What conclusions can the nurse make about the study results?

When a small letter a (e.g., ^a) is beside a Pearson r statistic, what does it usually indicate?

In the exemplar study about depressive symptoms in patients with heart failure (Graven et al, 2014) , which of the following significant relationships was found?

What does a p-value of 0.08 mean?

What does a negative correlation statistic value mean?

In a correlation study, the p value of a Pearson r statistic is 0.005. What does this mean?

Quiz 6: Correlational Research

The strength of association between two variables is indicated by which statistical method?

Which of the following statements is an accurate interpretation of the statistical result Pearson r = 0.70?

When one variable precedes the other in time and the correlation between them is high, which statement can be made with confidence?

What does the statistic r2 represent?

What are the two dimensions that describe a relationship between two variables?

In correlational research when two variables have a very strong relationship, the Pearson r value will be near:

A nurse is reviewing results in a study measuring the correlation between pain and patients' activity level. The Pearson r of the association between the two variables is .66. What conclusions can the nurse make about the study results?

When a small letter a (e.g., a) is beside a Pearson r statistic, what does it usually indicate?

In the exemplar study about depressive symptoms in patients with heart failure (Graven et al, 2014) , which of the following significant relationships was found?

What does a p-value of 0.08 mean?

What does a negative correlation statistic value mean?

In a correlation study, the p value of a Pearson r statistic is 0.005. What does this mean?

What does the statistic r²represent?

When a small letter a (e.g., ^a) is beside a Pearson r statistic, what does it usually indicate?