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Author Question: What is the primary threat to internal validity that could confound the results of a regression ... (Read 76 times)

jon_i

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on: Jul 13, 2018
What is the primary threat to internal validity that could confound the results of a regression discontinuity study?
 
  a. maturation
  b. selection-history
  c. attrition
  d. testing

Question 2

Which type of study may NOT have an implied null hypothesis?
 
  a) correlational
  b) descriptive
  c) quasi-experimental
  d) experimental


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k.lashomb

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

B

Answer to Question 2

b


jon_i

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Reply 2 on: Jul 13, 2018
Wow, this really help

raenoj

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

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