Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

8 steps of hypothesis testing

1. determine purpose of test 2. state the hypotheses (and decide one-tailed vs. two-tailed test) 3. set the significance (alpha) level 4. compute the test statistic 5. determine the degrees of freedom of freedom (if necessary) 6. identify the critical value and find the rejection region 7. make a statistical decision 8. make a clinical/substantive conclusion.

null hypothesis

hypothesis being tested

alternative hypothesis

research hypothesis

when we write the null and alternative hypotheses always use the...parameter (remember we are testing a sample statistic about the population)

population, infer

one tailed test

directional. interested in whether the mean of group 1 is significantly larger or smaller than the mean of group 2

two-tailed test

nondirectional. interested in whether the mean of group 1 is significantly different than the mean of group 2. looking for a difference without specifying whether the difference is higher or lower

significance level

level of willingness to make an error in rejecting the null hypothesis.

Type 1 error

the null hypothesis is rejected when it is true. the probability to make this kind of error equals alpha. is a false positive.

type 2 error

the null hypothesis is not rejected when it is false. probability to make this kind of error is beta. is a false negative.


=1-beta. probability of rejecting the null hypothesis when it is false. the probability of making a correct decision to reject the null

factors that affect power

alpha level, effect size, sample size

effect size

simple way to quantify the difference between groups (i.e. magnitude). a measure of the effectiveness of the treatment.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording