Random selection refers to a. the unreliability of two ...

[tfester]

Random selection refers to
 
  a. the unreliability of two different experiments yielding different results.
  b. the matching of participants on several different factors.
  c. the process of categorizing continuous variables as dichotomous variables.
  d. the technique used to ensure that each participant has an equal chance of being selected for an experiment.

Question 2

_____ designs are to studying individuals of different ages at the same time as _____ designs are to studying the same people over a period of time.
 
  a. Sequential; cross-sectional
  b. Longitudinal; sequential
 c. Longitudinal; cross-sectional
  d. Cross-sectional; longitudinal

[Jadwiga9]

Answer to Question 1

D

Answer to Question 2

d

[tfester]

Wow, this really help

[miss_1456@hotmail.com]

Thanks for the timely response, appreciate it