STT 200 EXAM 2 QUESTIONS AND
ANSWERS | 2026 LATEST UPDATE |
100% GUARANTEED PASS
Which of the following gives a correct interpretation of the slope?
A. A student who scored 0 on the midterm would be predicted to score 50 on the final
exam
B. A student who scored 0 on the final exam would be predicted to score 50 on the
midterm exam
C. A student who scored 2 points higher than another student on the midterm would be
predicted to score 1 point higher than the other student on the final exam
D. None of the interpretations above are correct interpretations of the slope
E. All of the interpretations above are correct interpretations of the slope - Answer- C. A
student who scored 2 points higher than another student on the midterm would be
predicted to score 1 point higher than the other student on the final exam
A basketball coach of a youth team wishes to predict the number of points the players
will score in their first season as a junior (y) based on the number of points they scored
in their last season as youth players (x). The average number of points the team scored
as youth players was X=7.9 and the average number of points they scored in their first
year as junior players was y=10.2. The slope is b1=0.79. What is the predicted number
of goals for a player who scored 7 goals in his last season as a youth player?
A. 7.78
B. 9.49
C 11.46
D. 15.58
E. 10.2 - Answer- B. 9.49
Which one of the following is not appropriate for studying the relationship between two
quantitative variables?
A. Scatterplot
B. Bar chart
C. Correlation
D. Regression - Answer- B. Bar chart
Which one of the following is a variable that we usually put on the horizontal axis of a
scatterplot?
A. y variable
, B. explanatory variable
C. response variable
D. Dependent variable - Answer- B. Explanatory variable
Which one of the following cannot be determined from a scatterplot?
A. A positive relationship
B. A negative relationship
C. A cause and effect relationship
D. A curvilinear relationship - Answer- C. A cause and effect relationship
A scatterplot is a
A. one-dimensional graph of a randomly scattered data
B. two-dimensional graph of a straight line
C. two-dimensional graph of a curved line
D. two-dimensional graph of data values - Answer- D. two-dimensional graph of data
values
Two variable have a positive association when
A. the values of one variable tend to increase as the values of the other variable
increase
B. the values of one variable tend to decrease as the values of the other variable
increase
C. The values of one variable tend to increase regardless of how the values of the other
variable change
D. The values of both variables are always positive - Answer- A. the values of one
variable tend to increase as the values of the other variable increase
Which of the following sets of variables is most likely to have a negative association?
A. the height of the son and the height of the father
B. the age of the wife and the age of the husband
C. the age of the mother and the number of children in the family
D. the age of the mother and the ability to have children - Answer- D. The age of the
mother and the ability to have children
Which of the following sets of variables is most likely to have a negative association?
A. the number of bedrooms and the number of bathrooms in a house
B. the number of rooms in a house and the time it takes to vacuum the house
C. the age of a house and the cleanliness of the carpets inside
D. The size of a house and its selling price - Answer- C. the age of a house and the
cleanliness of the carpets inside
A regression line is a straight line that describes how values of a quantitative
explanatory variable (y) are related, on average, to values of a quantitative response
variable (x).
A. true
B. false - Answer- B. false
ANSWERS | 2026 LATEST UPDATE |
100% GUARANTEED PASS
Which of the following gives a correct interpretation of the slope?
A. A student who scored 0 on the midterm would be predicted to score 50 on the final
exam
B. A student who scored 0 on the final exam would be predicted to score 50 on the
midterm exam
C. A student who scored 2 points higher than another student on the midterm would be
predicted to score 1 point higher than the other student on the final exam
D. None of the interpretations above are correct interpretations of the slope
E. All of the interpretations above are correct interpretations of the slope - Answer- C. A
student who scored 2 points higher than another student on the midterm would be
predicted to score 1 point higher than the other student on the final exam
A basketball coach of a youth team wishes to predict the number of points the players
will score in their first season as a junior (y) based on the number of points they scored
in their last season as youth players (x). The average number of points the team scored
as youth players was X=7.9 and the average number of points they scored in their first
year as junior players was y=10.2. The slope is b1=0.79. What is the predicted number
of goals for a player who scored 7 goals in his last season as a youth player?
A. 7.78
B. 9.49
C 11.46
D. 15.58
E. 10.2 - Answer- B. 9.49
Which one of the following is not appropriate for studying the relationship between two
quantitative variables?
A. Scatterplot
B. Bar chart
C. Correlation
D. Regression - Answer- B. Bar chart
Which one of the following is a variable that we usually put on the horizontal axis of a
scatterplot?
A. y variable
, B. explanatory variable
C. response variable
D. Dependent variable - Answer- B. Explanatory variable
Which one of the following cannot be determined from a scatterplot?
A. A positive relationship
B. A negative relationship
C. A cause and effect relationship
D. A curvilinear relationship - Answer- C. A cause and effect relationship
A scatterplot is a
A. one-dimensional graph of a randomly scattered data
B. two-dimensional graph of a straight line
C. two-dimensional graph of a curved line
D. two-dimensional graph of data values - Answer- D. two-dimensional graph of data
values
Two variable have a positive association when
A. the values of one variable tend to increase as the values of the other variable
increase
B. the values of one variable tend to decrease as the values of the other variable
increase
C. The values of one variable tend to increase regardless of how the values of the other
variable change
D. The values of both variables are always positive - Answer- A. the values of one
variable tend to increase as the values of the other variable increase
Which of the following sets of variables is most likely to have a negative association?
A. the height of the son and the height of the father
B. the age of the wife and the age of the husband
C. the age of the mother and the number of children in the family
D. the age of the mother and the ability to have children - Answer- D. The age of the
mother and the ability to have children
Which of the following sets of variables is most likely to have a negative association?
A. the number of bedrooms and the number of bathrooms in a house
B. the number of rooms in a house and the time it takes to vacuum the house
C. the age of a house and the cleanliness of the carpets inside
D. The size of a house and its selling price - Answer- C. the age of a house and the
cleanliness of the carpets inside
A regression line is a straight line that describes how values of a quantitative
explanatory variable (y) are related, on average, to values of a quantitative response
variable (x).
A. true
B. false - Answer- B. false
