1) Including only one sex and age group in the study will
reduce________ in the study and also reduce the______ among the
individuals making the study more powerful (although its
conclusions will only apply to that sex and age group)
QUESTION 4
Match the experimental design with the features that best
describe it.
| - 1) . |
Every combination of two or more treatment variables of interest
is investigated allowing researchers to test multiple variables and
their interaction simultaneously.
|
| 2) |
Experimental units sharing extraneous features are grouped into
sets and all treatments are randomly assigned to experimental units
within every set. This design removes the effects of extraneous
sources of variation between sets, reducing the sampling error of
estimates of effects.
|
| 3) |
Treatments are arbitrarily assigned to all experimental units.
The advantage is that it removes the effect of confounding
variables on the correlation between treatment and response,
reducing bias.
|
|
| A. |
factorial design
|
| B. |
randomized block design
|
| C. |
completely randomized design
|
|