Question 648505: The scatter plot below shows the relationship between pre-test and post-test scores in a Statistics class. The horizontal axis represents the pre-test scores. Use this graph to answer the questions below.
(The graph is positive and the correlations are in the upper hand corner the points are as follows...(50,60),(55,65),(60,55),(70,70)(75,75),(80,85),(85,90), and (80,95).
(A) How would you describe the relationship between pre-test and post-test scores in this class?
(B) Approximately what post-test score did the student with a pre-test score of 70 receive?
(C) Would the slope of the "line of best fit" be positive or negative?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The scatter plot below shows the relationship between pre-test and post-test scores in a Statistics class. The horizontal axis represents the pre-test scores. Use this graph to answer the questions below.
(The graph is positive and the correlations are in the upper hand corner the points are as follows...(50,60),(55,65),(60,55),(70,70)(75,75),(80,85),(85,90), and (80,95).
(A) How would you describe the relationship between pre-test and post-test scores in this class?
They have a positive linear correlation.
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(B) Approximately what post-test score did the student with a pre-test score of 70 receive?
Ans: 70
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(C) Would the slope of the "line of best fit" be positive or negative?
Ans: positive
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Cheers,
Stan H.
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