![]() ![]() Transfer the dependent variable, C1 Exam score into the Response: box, and the independent. on the top menu, as shown below: Published with written permission from. \(y_i=\beta_0+\beta_1x_ x_2\) as the predictors. Therefore, the three steps required to run a linear regression in Minitab are shown below: Click S tat > R egression > R egression. So, let's formulate a piecewise linear regression model for these data, in which there are two pieces connected at x = 70: As you can see, the estimated two-piece function, connected at 70% -the dashed line -appears to do a much better job of describing the trend in the data. We could instead split our original scatter plot into two pieces -where the water-cement ratio is 70% -and fit two separate, but connected lines, one for each piece. 22.2 Simple Regression Minitab offers many options for modelling regression equations, some of which are incorporated in version 16. Provides yet more evidence that our model needs work.
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