Indicate whether an independent groups t test or a correlatedgroups t test shoul
ID: 2919278 • Letter: I
Question
Indicate whether an independent groups t test or a correlatedgroups t test should be used to analyze the relationship betweenthe independent and dependent varilables. Assume that theunderlying assumptions of the tests have been satisfied.(Could you exlpain the reasaon?).... If a researcher suspects that the strength of the relationshipbetween two variables in the population is .25 as indexed byeta-squared, what sample size should he use in a study involvingtwo corelated groups and an alpha level of .05, directional test,in order to achieve a power of .90? Indicate whether an independent groups t test or a correlatedgroups t test should be used to analyze the relationship betweenthe independent and dependent varilables. Assume that theunderlying assumptions of the tests have been satisfied.
(Could you exlpain the reasaon?).... If a researcher suspects that the strength of the relationshipbetween two variables in the population is .25 as indexed byeta-squared, what sample size should he use in a study involvingtwo corelated groups and an alpha level of .05, directional test,in order to achieve a power of .90? If a researcher suspects that the strength of the relationshipbetween two variables in the population is .25 as indexed byeta-squared, what sample size should he use in a study involvingtwo corelated groups and an alpha level of .05, directional test,in order to achieve a power of .90?
Explanation / Answer
correlated groups t test is used when the samples aredependent; that is, when there is only one sample that has beentested twice (repeated measures) or when there are two samples thathave been matched or "paired". hence, If a researcher suspects that the strength of therelationship between two variables in the population is .25 asindexed by eta-squared, what sample size should he use in a studyinvolving two corelated groups and an alpha level of .05,directional test, in order to achieve a power of .90? here correlated groups t test isused