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Author Question: Selection bias can be a potential threat to internal validity when subjects are assigned to groups ... (Read 168 times)

HCHenry

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on: Jul 13, 2018
Selection bias can be a potential threat to internal validity when subjects are assigned to groups
 
  a. in a random fashion
   b. on the basis of different criteria for the different groups
  c. in a way that insures that similar people are in each group
  d. none of the above

Question 2

Covariance means to vary together. What is the opposite of covariance in a bivariate
  relationship?
 
  A) scattergram B) anticovariance
  C) univariance D) statistical independence


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jesse.fleming

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Reply #1 on: Jul 13, 2018
Answer to Question 1

B

Answer to Question 2

D


HCHenry

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Reply 2 on: Jul 13, 2018
:D TYSM

xiaomengxian

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Reply 3 on: Yesterday
Excellent

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