Question: Fit a linear spline having two knots at X = 8 and X = 16. Report the final regression model and use it for

Fit a linear spline having two knots at X = 8 and X = 16. Report the final regression model and use it for predicting y when x = 10.7. Also construct a 95% confidence interval for the mean ofy when X = 10.7.

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