Author Question: In an experiment, the purpose for manipulating the independent variable is to help ____. a. ... (Read 47 times)

mia

  • Hero Member
  • *****
  • Posts: 564
In an experiment, the purpose for manipulating the independent variable is to help ____.
 
  a. establish the direction of the relationship by showing that the dependent variable changes when you manipulate the independent variable
  b. eliminate the third variable problem because you decide when to manipulate rather than waiting for the variable to change
  c. establish the direction of the relationship and help eliminate the third variable problem
 d. ensure that any effects of selection bias or other randomization failures are minimized

Question 2

Any sampling method in which sampling continues until a specific number of sampled units for each subgroup of a population have been included is called a(n) ____ sample.
 
  a. quota
 b. snowball
 c. heterogeneity
  d. expert



joanwhite

  • Sr. Member
  • ****
  • Posts: 308
Answer to Question 1

c

Answer to Question 2

a



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

For a complete list of videos, visit our video library