This topic contains a solution. Click here to go to the answer

Author Question: What is the primary threat to internal validity that could confound the results of a regression ... (Read 75 times)

jon_i

  • Hero Member
  • *****
  • Posts: 549
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



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

k.lashomb

  • Sr. Member
  • ****
  • Posts: 346
Answer to Question 1

B

Answer to Question 2

b




jon_i

  • Member
  • Posts: 549
Reply 2 on: Jul 13, 2018
Great answer, keep it coming :)


ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
Excellent

 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

For a complete list of videos, visit our video library