Exam 13: Understanding Research Results: Statistical-Inference Basics

The desired probability of correctly rejecting the null hypothesis is the

The null hypothesis is rejected whenever

Jay calculates the 95% confidence interval for the difference between means.He finds the interval ranges from 1.85 to 4.08.What might Jay conclude from this finding?

A researcher interested in the use of discipline practices by males versus females predicted that men would use power-oriented practices more frequently than women.The research hypothesis would be that

A consumer analyst asks participants to rate the comfort of the ride for two brands of all-terrain tires: Trail Cushion and Mud Handler.Trail Cushion was rated more comfortable with a mean of 5.5 than Mud Handler with a mean of 4.3.The Type I error would be to conclude that Trail Cushion was

Dr.Walters finds that students who work less than 10 hours a week have significantly higher test scores than students who work more than 10 hours a week.In order to determine the magnitude of the effect of work hours on test scores,she should calculate a(n)

Which one of the following accurately describes the relationship between concepts?

In testing differences between means,the _____ hypothesis would suggest any observed difference is due to _____.

A researcher wants to determine if cholesterol level is lower for vegetarians versus non-vegetarians.Which statistical test would be most appropriate to analyze the data?

Deacon finds that,on the average,males have higher starting salaries than females.In order to conclude that the differences in starting salaries are true differences and not a result of random error,Deacon would employ the use of _____ statistics.

Leticia has collected data on the relationship between physical attractiveness and judgments of personality characteristics.In order to determine if the results obtained from the sample are representative of the population,Leticia will need to employ _____ statistics.

_____ is/are used to tell you the probability that your results would be obtained again if you repeated the study on many occasions.

A manipulation check is especially important when

A Type II error is a decision to

In an examination of the strength of relationship between study time and test score,the null hypothesis would be

Negative results are problematical because they

Error variance is the deviation of

Based on her use of inferential statistics,Martha believes that the difference in happiness scores between single versus married women in her study is a true difference.Thus,she would _____ and assume _____.

Variance within a sample is used as part of the calculation for which of the following statistical tests?

According to her statistical analysis,an investigator found that significantly more men than women used spanking to discipline their children.Thus,the investigator would