A random sample of two variables, x and y, produced the following observations: x y 19.. 7
Question:
x y
19………………….. 7
13………………….. 9
17………………….. 8
9…………………..11
12………………….. 9
25………………….. 6
20………………….. 7
17………………….. 8
a. Develop a scatter plot for the two variables and describe what relationship, if any, exists.
b. Compute the correlation coefficient for these sample data.
c. Test to determine whether the population correlation coefficient is negative. Use a significance level of 0.05 for the hypothesis test.
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Step by Step Answer:
a The scatter plot is shown below From the scatter pl...View the full answer
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Related Book For 
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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