Exam 14: Multifactor Experiments

A researcher who wants to test the relationship between nominal or ordinal variables should use an) ____________ test.

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

A quasi-experiment was conducted to compare men's and women's attitudes about extramarital affairs. Men and women who are married were recruited to complete a survey about their attitudes. The researchers then compared scores on the survey for men and women. The appropriate statistical test to analyze the data in this study is

The type of statistical test chosen depends on the type of hypothesis researchers make for a study.

Discuss Analysis of Variance including main effects, interaction effects, and post hoc tests.

If a study involves comparing means from a factorial design, the appropriate statistical test is

The number of scores that can vary in the calculation of a statistic is called:

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

Explain why errors can never be eliminated from statistical tests.

Statistical tests for effects are based on a ratio of the size of the difference in the sample means and sampling error to allow us to determine what part of the mean difference is due to the effect and which part is due to sampling error.

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

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.

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

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

The hypothesis that an effect or relationship exists or exists in a specific direction) in the population is the:

Variability of the sample indicates the amount of ___________ present because samples with high variability are less likely to be good representations of the population.

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

If the output for a statistical test contains a p value that is less than or equal to alpha, the test is significant and the null hypothesis can be rejected.

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.

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.