A researcher has observed that children who eat more sugar tend ...

[deesands]

A researcher has observed that children who eat more sugar tend to show a higher level of activity than children who eat less sugar. However, the researcher suspects that the apparent relationship may be explained by the fact that some children have a higher rate of metabolism, which causes them to eat more and to be more active compared to children with a lower rate of metabolism who eat less and are less active. This is an example of the ____.
 
  a. directionality problem
 b. third-variable problem
 c. extraneous variable problem
  d. manipulation check problem

Question 2

Following a natural disaster, interviewers seek out typical victims to ask them about their experiences. In doing so, they are seeking a(n) ____ sample.
 
  a. convenience
 b. purposive
 c. modal instance
  d. expert

[anoriega3]

Answer to Question 1

b

Answer to Question 2

c

[deesands]

TYSM

[Kedrick2014]

Excellent