This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Selection bias can be a potential threat to internal validity when subjects are assigned to groups ... (Read 106 times)

HCHenry

  • Hero Member
  • *****
  • Posts: 591
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jesse.fleming

  • Sr. Member
  • ****
  • Posts: 301
Reply #1 on: Jul 13, 2018
Answer to Question 1

B

Answer to Question 2

D


HCHenry

  • Member
  • Posts: 591
Reply 2 on: Jul 13, 2018
Great answer, keep it coming :)

Bigfoot1984

  • Member
  • Posts: 321
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Living in groups and the many eyes hypothesis. Living in groups and the many eyes hypothesis.
Variation in the rate of evolution as a function of the strength of selection, assuming genetic drif Variation in the rate of evolution as a function of the strength of selection, assuming genetic drif
Potential energy Vs. Kinetic energy Potential energy Vs. Kinetic energy
Blood Groups and Blood Types Blood Groups and Blood Types
The body’s survival depends on mechanisms that maintain internal homeostasis The body’s survival depends on mechanisms that maintain internal homeostasis
Alleles and blood groups Alleles and blood groups
Video: Digestive System Animation

For a complete list of videos, visit our video library