A simple statistical test commonly used to test the difference between the means of two groups on some dependent variable is the

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The t-test is specifically designed to test the difference between the means of two groups on some dependent variable. The correlation coefficient measures the strength and direction of the relationship between two variables, but does not specifically test for differences in means. Multivariate analysis of variance (MANOVA) is used when there are multiple dependent variables and one independent variable, and standard deviation is a measure of the spread of data around the mean, but neither of these methods are specifically designed for testing the difference between means of two groups.

A Simple Statistical Test Commonly Used to Test the Difference