Exam 13: Understanding Research Results: Statistical Inference

A consumer analyst asks participants to rate the health benefits of two health drinks-EnerG and Supreme. EnerG is rated more nutritive with a mean of 5.5 than Supreme, which is found to have a mean of 4.3. The Type II error would be to conclude that EnerG is:

When analyzing the difference between two means, Professor Angus obtains the effect size as .85 using Cohen's d. In this case, Professor Angus can conclude that:

Inferential statistics _____.

A desired probability of correctly rejecting the null hypothesis is the _____.

Adrian found no significant difference in the amount of money spent on entertainment on those students who live on campus versus those who live off campus. Based on this finding, Adrian would:

Which of the following accurately describes the relationship between concepts?

A researcher asked participants to rate the quality of two well-known brands of paper bags-Prime and Zenith. Prime was rated higher than Zenith with mean ratings of 5.50 and 3.25 respectively. This difference was statistically significant at the .05 probability level. The research hypothesis for this study suggests that:

A student is interested in the effect of environmental conditions on task performance. She makes participants complete a series of math problems under different conditions of temperature-cold, warm, and hot, and different noise conditions-quiet and noisy. The most appropriate test to analyze the data would be a(n) _____.

The significance level chosen by a researcher is dependent on the _____.

_____ variance is the deviation of the individual scores in each group from their respective group means.