Exam 9: More About Using Statistics

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

When each participant experiences all levels of the independent variable, this is called ______ variable.

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

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

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 ______.

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

The independent samples t test is used when ______ samples of different individuals are compared.

For related samples tests, scores for different conditions go in separate columns; no group codes are needed.

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 critical region is the most extreme portion of a distribution of statistical values for the null hypothesis, determined by the alpha level, typically of ______.

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

What is a Type I error? Please provide an example.

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

A researcher was interested in the effect of anxiety on intelligence measurement. A group of 100 individuals were placed in an anxiety-provoking situation before being given an IQ test. The scores for this group were then compared to the IQ population mean of 100. The appropriate statistical test to analyze the data in this study is ______.

Discuss the Pearson r statistic. What type of relationships does it measure?

"One-way ANOVA" test analyzes ______ subject variable(s).

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

The first question to address about the study design in identifying the correct statistical test is to ______.

Discuss analysis of variance including main effects, interaction effects, and post hoc tests.

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.