Exam 11: Correlated Groups T-Test

The calculation of ____________________is similar in both the correlated and independent groups t-test.

The dependent variable must be ____________________in nature if a correlated groups t-test is used.

If the sample size is less than 15,the correlated groups t test may show inflated Type I errors for data that are markedly skewed.

The correlated groups t-test is only used when the independent variable is____________________.

Which of the following statements describes a correlated-groups t test null hypothesis?

The analysis of the nature of the relationship for the correlated groups t test involves examination of the mean scores for the two conditions.

If the researcher suspects that the strength of the relationship between two variables in the population is .25,what sample size should she use per group in a study involving two correlated groups and an alpha level of .05,directional test,in order to achieve a power of .90?

The correlated groups t-test assumes the population of difference scores is normally distributed.

A sampling distribution of the mean of difference scores can be defined as a theoretical distribution consisting of mean difference scores across individuals for all possible random samples of a given size that could be selected from a population.

The procedure of _____ may be used in order to evenly distribute carry-over effects across conditions.

The degrees of freedom associated with correlated t-test is____________________.

Jake is working on his thesis and has two groups of subjects.A total of 10 subjects listened to music at 80 decibels which is considered loud.While the other 10 subjects listed to the same music at only 30 decibels which is soft.After 1 hour each groups was given a hearing test.However,he matched subjects before they were put into groups on hearing abilities.What statistical test should be used to analyze the data?

If we were to compute the average nullified score across conditions for each individual in a correlated groups study,we would find that every individual would have _____ average score(s).

A reading readiness test is administered to 8 matched pairs of first graders.One child of each pair had 3 years of day care experience whereas the other child had none.The results of the test are shown in the following table.(Higher scores indicate greater readiness. )Assume á=.05,nondirectional test. The eta² for the "reading readiness" data is _____.

The formula for computing eta-squared for the correlated groups t test is _____ that for the independent groups t test.

The 95% confidence interval for the mean differences is reported following _____.

When using a correlated-groups t test design,we calculate the degrees of freedom using ______,where N= number of difference scores.

The correlated groups t test has N - 2 degrees of freedom associated with it.

The assumption of independent,random sampling is not an important one for the correlated groups t test.

For sample sizes of 40 or more,the correlated groups t test is quite robust to violations of the normality assumption,even for distributions exhibiting considerable skewness.