Psychology5/Statistics- Chapter 6 Quiz
Rejecting the null hypothesis when the research hypothesis is false is...
a Type I error
Setting the significance level cutoff at .10 instead of the usual .05 increases the likelihood of...
a Type I error
Failing to reject the null hypothesis when the research hypothesis is true is...
a Type II error
The conventional levels of significance of 5% and 1%...
are a compromise between the risks of making Type I and Type II errors
A psychologist conducts a study and finds that d = 1.41. This effect size would most likely be described as...
large
Effect size is...
the degree to which an experimental manipulation separates two populations
Effect size is one of the two major factors that contribute to power; the other factor is...
the sample size
One important advantage of using effect sizes is that...
they are standardized scores that make comparisons of different studies easier
Type II errors concern psychologists because...
they could mean that good theories or useful practical procedures are not used.
In actual practice, the usual reason for determining power before conducting a study is...
to determine the number of participants needed to have a reasonable level of power