A researcher is more likely to obtain statistically significant results when
a. the alpha-level is high
b. beta is high
c. the number of participants is high
d. error variance is low
e. all of the above
Although theories can never be ______, they can be _______by the results of a particularresearch study.
a. proved; disproved
b. disproved; proved
c. proved; supported
d. tested; falsified
e. falsified; proved
A power analysis is often used to determine
a. the number of participants needed for a study
b. the likelihood of making a Type I error
c. the strength of the independent variable
d. whether to reject the null hypothesis
e. the alpha-level
The concept of race is controversial scientifically because
a. the social history of the races has always been troublesome.
b. the genetic differences between some races is larger than it is between other races.
c. depending on the categorization process used, an individual could be placed in different racial categories.
d. scientists have not been able to determine exactly where the different races fall on the racial continuum.
Researchers often make Type II errors when
a. a Type I error occurs
b. the results are statistically significant
c. power is low
d. the effect size is large
e. they reject the null hypothesis
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