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Author Question: True or False For a given data set of (x,y) values, an infinite number of possible regression ... (Read 42 times)

james9437

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on: Jun 24, 2018
True or False For a given data set of (x,y) values, an infinite number of possible regression equations can be fitted to the corresponding scatter diagram, and each equation will have a unique combination of values for the y-intercept b0 and the slope b1 . However, only one equation will be the best fit as defined by the least-squares criterion.
  Indicate whether the statement is true or false

Question 2

Whether testing a single sample or comparing paired samples, how should one go ahead deciding whether to use the sign test versus the Wilcoxon signed rank test?


ricroger

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Reply #1 on: Jun 24, 2018
Answer to Question 1

T

Answer to Question 2

The sign test does not use all of the information contained in the data; the data are merely reduced to (+) and (-) signs, and magnitude is ignored. If the original data are interval in nature, the Wilcoxon signed rank test will provide a more powerful test.


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