Below is data of the variables Y, X1, X2, X3 and X4. Test for the presence of
multicollinearity.
Y 223.5 215 227.5 244.5 313.5 279 238 315.5 217 209.5
X1 2.63 2.55 2.58 2.72 2.63 2.67 2.63 2.67 2.63 2.61
X2 18.75 13.87 14.27 18.76 18.77 13.87 14.14 18.76 18.72 18.76
X3 13.87 12.83 13.16 15.19 13.92 14.42 13.83 14.5 13.87 13.64
X4 5.13 5.18 5.71 5.59 5.21 5.07 5.65 5.89 5.57 6.09
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