Scatter Diagram Practice Test Practice Tests

Question 1

What is the primary purpose of a scatter diagram?

Accepted Answer

A. To visualize the relationship between two quantitative variables

Answer

B. To display the frequency distribution of a single variable

Answer

C. To compare the means of two or more groups

Answer

D. To show the proportion of different categories in a dataset

Question 2

In a scatter diagram, the explanatory variable is plotted on the y-axis.

Accepted Answer

False

Answer

True

Question 3

Which of the following correlation coefficient values indicates the strongest negative linear relationship?

Accepted Answer

D. -0.9

Answer

A. 0.5

Answer

B. -0.3

Answer

C. 0.1

Question 4

A scatter diagram can be used to establish causation between two variables.

Accepted Answer

False

Answer

True

Question 5

In a scatter diagram showing the relationship between hours studied and exam score, what does a point far away from the general trend likely represent?

Accepted Answer

B. An outlier

Answer

A. A typical data point

Answer

C. The mean value

Answer

D. The median value

Question 6

A scatter diagram shows a cloud of points with no clear pattern. What does this indicate?

Accepted Answer

C. No linear relationship between the variables

Answer

A. A strong positive relationship

Answer

B. A strong negative relationship

Answer

D. A curvilinear relationship

Question 7

The correlation coefficient is resistant to outliers.

Accepted Answer

False

Answer

True

Question 8

If a scatter diagram shows that as the value of X increases, the value of Y tends to decrease, what type of correlation is suggested?

Accepted Answer

B. Negative correlation

Answer

A. Positive correlation

Answer

C. Zero correlation

Answer

D. Curvilinear correlation

Question 9

Data on the number of ice cream cones sold versus the temperature on that day is plotted on a scatter diagram. The correlation coefficient is 0.85. What does this suggest?

Accepted Answer

A. A strong positive linear relationship between temperature and ice cream cone sales

Answer

B. A weak negative linear relationship between temperature and ice cream cone sales

Answer

C. No linear relationship between temperature and ice cream cone sales

Answer

D. Temperature causes ice cream sales

Question 10

A scatter diagram is only useful for identifying linear relationships.

Accepted Answer

False

Answer

True

Question 11

Which of the following is NOT a limitation of using a scatter diagram?

Accepted Answer

D. It can visually represent the relationship between two quantitative variables.

Answer

A. It cannot establish causation.

Answer

B. It is sensitive to outliers.

Answer

C. It may not reveal non-linear relationships clearly.

Question 12

What is the range of values for the Pearson correlation coefficient, r?

Accepted Answer

B. -1 to 1

Answer

A. 0 to 1

Answer

C. -infinity to infinity

Answer

D. 0 to infinity

Question 13

If the correlation coefficient, r, is 0, it means there is no relationship whatsoever between the two variables.

Accepted Answer

False

Answer

True

Question 14

In a scatter diagram, if all the points fall perfectly on a straight line with a positive slope, what is the correlation coefficient, r?

Accepted Answer

A. 1

Answer

B. -1

Answer

C. 0

Answer

D. 0.5

Question 15

A researcher plots a scatter diagram of height vs. weight for a group of adults and observes a positive correlation. Which statement is the most appropriate interpretation?

Accepted Answer

B. Taller adults tend to weigh more.

Answer

A. Increased height causes increased weight.

Answer

C. Increased weight causes increased height.

Answer

D. Height and weight are unrelated.

Question 16

Which of the following is the primary purpose of a scatter diagram?

Accepted Answer

B. To visually display the relationship between two quantitative variables

Answer

A. To summarize categorical data

Answer

C. To calculate probabilities

Answer

D. To measure central tendency

Question 17

In a scatter diagram, the explanatory variable is typically plotted on the y-axis.

Accepted Answer

True

Answer

False

Question 18

What does a positive correlation in a scatter diagram indicate?

Accepted Answer

A. As one variable increases, the other tends to increase.

Answer

B. As one variable increases, the other tends to decrease.

Answer

C. There is no relationship between the variables.

Answer

D. The relationship is non-linear.

Question 19

Which of the following values of the correlation coefficient 'r' indicates the strongest linear relationship?

Accepted Answer

D. -0.9

Answer

A. 0.1

Answer

B. 0.5

Answer

C. -0.3

Question 20

A correlation coefficient of 0 indicates that there is no relationship between the two variables.

Accepted Answer

True

Answer

False

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