Random sampling helps the scientist ensure that the
a. data is falsifiable.
b. sample is representative of the population.
c. project will not be costly.
d. population is large.
b. sample is representative of the population.
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What is a good control group for a research study on people with eating disorders?
A. People who have eating disorders and a wide range of educational backgrounds B. A group that is comparable to the one with eating disorders, except that they eat normally C. A group that is drawn from the sample of people with eating disorders D. People who used to have eating disorders but say they no longer do
If all participants in a repeated-measures study show roughly the same 10-point difference between treatments, then the data are likely to produce a significant value for the t statistic
Indicate whether the statement is true or false
For a study conducted in a closed system, there is ____ compared to an open system
a. more control b. less control c. more external validity d. less internal validity
When participants are randomly assigned either to an experimental condition or to a control condition, this is called a __________ design
FIll in the blank with correct word.