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Author Question: Discuss the courses of action a researcher can follow to control extraneous variables and the ... (Read 90 times)

elizabeth18

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on: Jun 29, 2018
Discuss the courses of action a researcher can follow to control extraneous variables and the statistical recourse that may be available if these fail to prevent a confound.

Question 2

Which of the following represents the standard deviation of the sampling distribution?
 a. range
  b. standard median
  c. dispersion
  d. standard error of the mean


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Loise Hard

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Reply #1 on: Jun 29, 2018
Answer to Question 1

The three courses of action to control extraneous variables include 1) holding extraneous variables constant where practical, 2) assigning treatments to test units randomly, and 3) using experimental designs that control for the effects of extraneous variables. If an extraneous variable confounds the experiment, analysis of covariance (ANCOVA) can be used to statistically de-bias the dependent variable by accounting for it separately within each of the levels of the confounding variable.

Answer to Question 2

D


elizabeth18

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Reply 2 on: Jun 29, 2018
Great answer, keep it coming :)

Dinolord

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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