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Univariate Data

One measurement on each unit.

Bivaraite Data

Data consisting on two measurements (two variables) on each unit in a study
1. Study relationship b/w two variables. 2. The two variables are the explanatory and response variables. Response denoted by Y and Explanatory is denoted by X. 3.Sometimes can't denote response or explanatory variables. 4. Variables can both be quantitative or categorical or one of each. 
Note

Our study of bivariate data will consist only of variables that are both quantitative or both categorical

Analyzing bivariate data steps

1. Plot data with a sactterplot
2. Computenumber summary called a correlation coefficient 3. Model linear relation with a straight line called the regression line 
Note

Explanatory variable also called Independent varivable
Respnse variable also called dependent vairable 