Note that the r you calculated is negative. How would we determine if this negative correlation is significant? Let's use a hypothetical example to illustrate. Suppose you caleulate r for 18 pairs of observations and find r-0.56. The DF = 16, and the critical value in the table would be 0.468. To test the significance of this negative r, you would ignore the negative sign, and see if it exceeds the critical value. You can think of the sign as indicating a direction, much like in velocity in physics. In our hypothetical example, the value 0.56 exceeds the critical value (0.468), so the correlation would be significant. Just be sure to report it as a significant negative correlation (-0.56). Is your negative correlation significant?
Note that the r you calculated is negative. How would we determine if this negative correlation is significant? Let's use a hypothetical example to illustrate. Suppose you caleulate r for 18 pairs of observations and find r-0.56. The DF = 16, and the critical value in the table would be 0.468. To test the significance of this negative r, you would ignore the negative sign, and see if it exceeds the critical value. You can think of the sign as indicating a direction, much like in velocity in physics. In our hypothetical example, the value 0.56 exceeds the critical value (0.468), so the correlation would be significant. Just be sure to report it as a significant negative correlation (-0.56). Is your negative correlation significant?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Note that the r you calculated is negative. How would we determine if this negative
correlation is significant? Let's use a hypothetical example to illustrate. Suppose you caleulate r
for 18 pairs of observations and find r=-0.56. The DF = 16, and the critical value in the table
would be 0.468. To test the significance of this negative r, you would ignore the negative sign,
and see if it exceeds the critical value. You can think of the sign as indicating a direction, much
like in velocity in physics. In our hypothetical example, the value 0.56 exceeds the critical value
(0.468), so the correlation would be significant. Just be sure to report it as a significunt negative
correlation (-0.56). Is your negative correlation significant?
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