Homework Clinic
Mathematics Clinic => Statistics => Topic started by: lracut11 on Aug 30, 2019
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Question 1
One of your classmates is reading through the program for Friday night’s football game. Among other things, the program lists the players’ positions and their weights. Your classmate comments, “There is a strong correlation between a player’’s position and their weight."
a. Explain why your classmate’s statement is in error.
b. What other variable might be listed in the program that could be used to correctly identify a correlation with weight?
Question 2
Match the following descriptions with the most likely correlation coefficient.
____ The number of hours you study and your exam score.
____ The number of siblings you have and your GPA.
____ The number of hours you practice a task and the number of minutes it takes you to complete it.
____ The number of hours you use a pencil and its length.
A. -0.78 B. 0.13 C. 0.46D. 0.89
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Answer 1
a. Player position is a categorical variable. You can't use correlation for categorical variables.
b. If the players’ heights were listed, you could find correlation, to give one example.
Answer 2
_C_ The number of hours you study and your exam score.
_B_ The number of siblings you have and your GPA.
_A_ The number of hours you practice a task and the number of minutes it takes you to complete it.
_D_ The number of hours you use a pencil and its length.