In correlational research, variables are only measured and not __________.

related

manipulated

fixed

varied

What is the purpose of correlation studies?

to determine the direction and degree of a relationship between 2 variables

to determine the difference between 2 variables

to describe the central tendency of a variable

to determine the cause of a relationship between 2 variables

Which statistic indicates the proportion of variance that two variables in a bivariate distribution have in common?

effect size

Pearson r Coefficient of determination

confidence intervals

Question at position 8

Which Pearson r indicates the strongestrelationship between two variables?

+ .25

+ .60

- .45

- .65