Levels of the Independent Variables are the values or distinctions of properties that they assume. Dependent Variables are the things about which data is collected after some manipulation, control, or treatment has been enacted. Tendencies Centrality - these are the statements of Mean, Median, and Mode. Mean is simple arithmetic averaging. Mode is simply the item that appears the most frequently in the data set.
Variance measures how much an element deviates away from the mean.
Dependent T-tests are useful when you are analyzing data involving 1 independent var. For example, comparing IQ by ethnic group. For example, comparing IQ by ethnic group AND gender. These tests are used to determine whether a relationship exists between two quantifiable variables. Correlation simply means that a relationship of some kind exists between two variables.