Exam 10: Testing Means: Related-Samples T Test With Confidence Intervals

A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes.The type of design described here is called a

Which of the following is an assumption for computing the related samples t test?

Both estimates of proportion of variance, and ,are computed the same for independent and related samples t tests.

The related samples t test is associated with no degrees of freedom.

To summarize a related samples t test,we report the test statistic,critical values,and p value.

Which of the following is the numerator of the test statistic for the related samples t test?

The denominator of the test statistic for a related samples t test

A researcher selects a sample of 36 dog owners and measures their responsiveness to pictures depicting the humane and inhumane treatment of dogs.The researcher finds that responsiveness significantly differed,t = 3.243.Use eta-squared to compute the proportion of variance for this result.

The test statistic for a related samples t test makes tests concerning a single sample of

A researcher records the time it takes (in seconds)for participants to respond (by pressing a key)to a familiar versus an unfamiliar word flashed onto a computer screen.In this study,the difference in response time for each participant is compared.The type of design described here is called a

To increase the value of estimated Cohen's d,a researcher increases the sample size.Will this change the value of d?

Each of the following is needed to compute the estimated Cohen's d,except

Using the same data,a related samples t test is more likely than a two-independent sample t test to result in a decision to reject the null hypothesis.

A researcher conducts a study in which the same participants are observed across each level of the independent variable.If there are only two levels of the independent variable,then what type of t test is appropriate for this study?

Original pairs of scores are first reduced to difference scores before computing the test statistic for the related samples t test.

All other things being equal,as the degrees of freedom increase,what happens to the critical value for a related samples t test (or for any t test,for that matter)?

The estimated standard error for difference scores is in the denominator of the test statistic for the related samples t test.

A researcher placed male rodents in the presence and absence of a conspecific male.Cortisol (a stress hormone)levels were compared at both times.What type of t test is most appropriate for this study?

The related samples design can ________ the power to detect an effect by making the standard error ________.

A researcher matched 30 participants on intelligence (hence 15 pairs of participants),and then compared differences in emotional responsiveness to two experimental stimuli between each pair.For this test,what are the critical values,assuming a two-tailed test at a .05 level of significance?