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In the more general multiple regression model, there are independent variables: = + + + +, where is the -th observation on the -th independent variable.If the first independent variable takes the value 1 for all , =, then is called the regression intercept.
Karoline Claire Leavitt (born August 24, 1997) [1] is an American political aide and government official who has been serving as the White House press secretary in the second Trump administration since January 2025.