A researcher for an environmental agency is investigating fuel economy she has developed a linear model for hwy gas mileage g, interms of the vehicle weight w,in thousands of pounds using a representative sample of car types the equation is g=-6.035w +46.33 interpret the slope of this equation. A.predicts increase of 1000lbs and causes increase of 46.33mpg. B. Predicts increase of 1000lbs decrease of 6.035 might C. Pridicts increase of 1000lbsand causes decrease of 46.33 mph D. Predicts increase of 1000lbs and increase of 6.035 mpg.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
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