Exam 11: Correlated Groups T-Test

Between-subjects designs (but not within-subjects designs)allow us to estimate the source of variability due to the influence of individual differences,and extract it from the dependent variable.

What is the difference between eta-squared for the correlated groups t test and eta-squared for the independent groups t test?

The degrees of freedom associated with a correlated group t-test if the number of subjects is 10 is_____.

Only the independent groups t-test assumes the dependent variable is quantitative in nature at an interval scale.

The analysis of the nature of the relationship for the _____ involves examination of the mean scores for the two conditions.

A correlated groups t-test is a parametric test and assumes_____.

Which of the following statistical tests should be used to analyze the relationship between the independent and dependent variables when the independent variable is within-subjects?

Dr.August is investigating whether or not women have more job satisfaction after they are given praise or a gift card (different levels or rewards).She has recruited 10 women from Intel and for 6 months the women received praise then the next 6 months they received a gift card.The conditions were counterbalanced and a survey on job satisfaction was distributed following the treatment conditions or every 6 months until the research was completed.After finishing her study Dr.August was busy writing a grant,therefore she has asked you to analyze her data below.Please note the survey was based on 1-5 Likert scale with high scores indicating high job satisfaction and low score indicating dissatisfaction. What should be done after the inference about the relationship has been determined?

Why is the correlated groups t test usually more powerful than the independent groups t test?

A test's sensitivity can be defined as its ability to detect a relationship between variables when a relationship exists in the population.

A correlated -groups t test can be used to analyze the relationship between two variables when _____.

The formula for computing eta-squared from t and its degrees of freedom for the correlated groups t test is the same as that for the independent groups t test.

An important advantage of the correlated groups t test over the independent groups t test relates to the control of confounding variables.

Although the correlated t test is usually a more powerful statistical test than the independent groups t test,one exception to this is

When we fail to reject the null hypothesis,the question of the nature of the relationship is:

The mean of the sampling distribution of mean difference scores is equal to the _____ across individuals in the population.

If the researcher suspects that the strength of the relationship between two variables in the population is .07,what sample size should she use per group in a study involving two correlated groups and an alpha level of .05,nondirectional test,in order to achieve a power of .70?

Which of the following conditions would make it inappropriate to use a correlated-groups t test?

One of the underlying assumptions of the correlated groups t test is that the population of mean scores is normally distributed.

Dr.August is investigating whether or not women have more job satisfaction after they are given praise or a gift card (different levels or rewards).She has recruited 10 women from Intel and for 6 months the women received praise then the next 6 months they received a gift card.The conditions were counterbalanced and a survey on job satisfaction was distributed following the treatment conditions or every 6 months until the research was completed.After finishing her study Dr.August was busy writing a grant,therefore she has asked you to analyze her data below.Please note the survey was based on 1-5 Likert scale with high scores indicating high job satisfaction and low score indicating dissatisfaction. What statistical test should be used to analyze Dr.Augusts' data?