Descriptive Statistics - Bivariate Descriptive Statistics

4 important questions on Descriptive Statistics - Bivariate Descriptive Statistics

What is an analysis of association between two variables called?

It is called a bivariate analysis, in which an outcome variable is compared to the other variable. The outcome variable is called the response variable (dependent variable). The variable that defines the groups is called the explanatory variable (independent variable).

How does a contingency table look like?

A contingency table displays the number of subjects observed at combinations of possible outcomes for the two variables.

What is the function of a scatterplot?

A scatterplot portrays bivariate relations between quantitative variables, with on the x-axis the explanatory variable and on the y-axis the response variable. It shows whether there is a correlation between two variables. This correlation can be either negative or positive.
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Wherefore could you use a regression analysis?

A regression analysis could provide a straight-line formula which can predicting the value of y from a given value of x.

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