Exam 9: More About Using Statistics

If the sphericity test is significant in the SPSS repeated measures output, the F statistic needs to be adjusted in order to retain accuracy of the test.

A developmental psychologist conducted an experiment to examine the effect of type of text used on math performance across age groups. Fifth grade and college students studied age-appropriate math concepts using either a traditional hard copy book text or an e-text available on the web. Performance on a math test of the concepts studied was then measured for all students. The appropriate statistical test to analyze the data in this study is ______.

Violations of the sphericity assumption can decrease the chance of a Type I error.

If a study involves an examination of the relationship between two variables measured on an interval or ratio scale, the appropriate statistical test is ______.

Additional significance tests conducted to determine which means are significantly different for a main effect are called ______.

Discuss the difference between levels and conditions for a factorial design.

If the p value for the statistic is less than or equal to the alpha level, the null hypothesis is ______.

When entering data into SPSS for a within-subjects study, one should always enter ______.

A significant difference between groups or conditions allows researchers to conclude that an effect exists in the population because they are able to reject the ______ in a significant test.

The ______ effect tests the effect of one independent variable at each level of another independent variable in an ANOVA.

The ability of a significance test to detect an effect or relationship when one exists is referred to as ______.

If a study involves comparing two means from a between-subjects design, the appropriate statistical test is ______.

There are ______ types of t tests used to compare means.

Sample mean differences can be caused by the effect, by sampling error, or both.

Samples with high variability will typically have a ______ margin of error in the population mean estimate.

If the p value for the statistic is less than or equal to the alpha level, the null hypothesis is accepted, and the researcher concludes that there is an effect.

Discuss the sphericity test. What needs to be done if the sphericity test is significant?

The probability level used by researchers to indicate the cutoff probability level (highest value) that will allow them to reject the null hypothesis is called ______.

The ______ value is less than or equal to alpha in an inferential test, and the null hypothesis can be rejected.

If a researcher wishes to predict the score on one measured variable from the score on another measured variable, the appropriate statistical test is ______.