![]() The solution to this is creating a scatterplot as shown below. However, this is difficult to see with even 10 cases -let alone more. Looking at these data, it seems that employees with higher IQ scores tend to have better job performance scores as well. They did so on 10 employees and the results are shown below. The very first step they should take is to measure both (job) performance and IQ on as many employees as possible. ![]() The point here is that calculations -like addition and subtraction- are meaningful on metric variables (“salary” or “length”) but not on categorical variables (“nationality” or “color”).Įxample: Predicting Job Performance from IQĬan we predict job performance from IQ scores? Remember that “ metric variables” refers to variables measured at interval or ratio level. Simple linear regression is a technique that predicts a metric variable from a linear relation with another metric variable. ![]() Simple Linear Regression – Quick Introduction By Ruben Geert van den Berg under Regression & Statistics A-Z ![]()
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