Use of a pretest as well as a posttest, rather than a posttest by itself, is valuable because
a) One can evaluate and statistically adjust for any pretest sensitization effect.
b) One can use a directional test to evaluate change, i.e., did patients improve.
c) Reduces bias due to multiple statistical tests
d) The error term is reduced in the statistical test and power is increased.
Question 2
How can power be augmented in an investigation?
a) Through the use of posttests
b) Through maintaining conventional levels of significance
c) Through the use of directional tests
d) Through controlling the side effects of treatment
Midway Island, an inhospitable atoll acquired in 1867, was valuable as a military base located midwa
The work of geneticists is valuable because genes play a role in virtually every aspect of ...
For the 2-year-old, encounters with peers provide valuable practice in communication and social ...
Example of pre- and posttest Interpretation in an Experiment
The Food Label Provides Valuable Consumer Information Manufacturers must adhere to strict labeling