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Practice - Bivariate Statistics (Level C)
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Practice Page
Directions: Read carefully.

1.

A scatter plot is shown in the coordinate plane.

Which of the following graphs most closely approximates a line of best fit for the data in this scatter plot?

 scatterplot1
Choose:
scatterplot1a
 scatterplot1b
scatterplot1c
 scatterplot1dd

 

 

2.
Which statement is true about the data in a scatter plot where the y-values are decreasing as the x-values are increasing?

Choose:
the data can be modeled by a vertical line
the data can be modeled by a horizontal line
the data can be modeled by a line with a positive slope
the data can be modeled by a line with a negative slope

 

 

3.
A scatter plot of data is shown at the right. Which association (correlation) best describes the data?

Choose:
positive linear association
negative linear association
non-linear association
no association
graph2

 

 

4.
The table below shows the relationship between total fat grams and the total calories in a selection of fast food sandwiches. This data can be modeled by the line y = 13x + 143, where x is the total fat in grams and y is the total calories.
 

calorietable

Based upon the model equation, what is the best prediction of the total calories for a sandwich with 36 total grams of fat?

Choose:
630
 611 610 598

 

 

5.
The number of hours spent dog sitting and the amount of money earned is plotted at the right. The line of best fit has the equation y = y = 5.5x + 11.8.

 


Which of the following statements can be considered a valid prediction based upon this data?
  Choose:
For each additional hour spent dog sitting, an additional $5.50 will be earned.
For each additional hour spent dog sitting, an additional $11.80 will be earned.
For dog sitting 6 hours, you can expect to earn $70.80.
For dog sitting 6 hours, you can expect to earn $33.00.

 

 

6.
A scatter plot of data is shown at the right. Which association (correlation) best describes the data?

Choose:
positive association
negative association
non-linear association
no association
nocorrel

 

 

7.
The table shows the number of gallons of gasoline used during five vacation related trips. (x = miles, y = gallons)
The line of best fit is
y = 0.05x + 0.63.
Using the equation, estimate to the nearest mile, the number of miles that you could expect to drive using 100 gallons of gasline.
 
Choose:
1,980
1,987
1,850
1,960

 

 

8.
A scatter plot of data is shown at the right. Which statement best describes the association between hours of study and final exam scores?

Choose:
there is no association
a non linear association
a positive linear association and one outlier
a negative association and one outlier

 

 

9.
Data is randomly collected from students regarding the number of hours they studied before the final exam, and their scores on the exam.

The scatter plot displays the data.
The line of best fit has the equation y = 3.7x + 61.6.

Which of the following statements best describes what the slope and y-intercept of the equation represent?
 
Choose:
The slope represents an increase of 3.7 points in exam score for every additional hour of study; the y-intercept is the most likely score (61.6) with no studying before the exam.
The slope represents an increase of 5 points in exam score for every additional hour of study; the y-intercept is the most likely score (0) with no studying before the exam.
The slope represents an increase of 3.7 points in exam score for every additional hour of study; the y-intercept is the most likely score (67.6) with no studying before the exam.
The slope represents an increase of 5 points in exam score for every additional hour of studying; the y-intercept is the most likely score (64.4) with no studying before the exam.

 

 

10.
Which equation best models this set of data?

Choose:
no104
no103
no102
NO101
number10NB

 

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