Exam 9: More About Using Statistics

If the p value is greater than the alpha level, the researcher cannot ______ the null hypothesis.

Briefly describe how to choose an appropriate statistical test?

A variable that includes three or more levels is called ______.

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

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

Analysis of variance (ANOVA) is used to test an effect when more than ______ groups or conditions are being considered.

If the p value is greater than the alpha level, the researcher cannot reject the null hypothesis and must conclude that there is no evidence of an effect.

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

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 most extreme portion of a distribution of statistical values for the null hypothesis determined by the alpha level is called ______.

The ______ is the assumption of between-subjects t tests and ANOVAs that the variance in the scores in the population is equal across groups.

SPSS will calculate inferential statistics, making it unnecessary that a researcher understands how the statistical tests work.

Counterbalancing is used to control ______.

A researcher who wants to test the relationship between nominal or ordinal variables should use a(n) ______.

The hypothesis that an effect or relationship does not exist (or exists in the opposite direction of the alternative hypothesis) in the population is the ______.

Samples with high variability contain scores that are similar to one another and are more likely to represent the population mean.

Explain what it means for a statistical test to be significant.

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

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

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.