The Following table shows recent study times and test scores for a sample of four students in
Question:
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a. Compute the covariance for study time and test score.
b. Compute the correlation coefficient for study time and test score.
c. Do the data show a high degree of association between study time and test score? Explain.
d. Do the data indicate that increased study time causes higher test scores? Explain.
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a 10 85 s xy 10 b s x 416 s y 913 r xy 263 c The correlation coefficient of 263 sugg...View the full answer
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Related Book For 
Understanding Business Statistics
ISBN: 978-1118145258
1st edition
Authors: Stacey Jones, Tim Bergquist, Ned Freed
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