Question: 12.87 A dependent variable is regressed on two inde- pendent variables. It is possible that the hypoth- eses Ho : B1 = 0 and Ho:

12.87 A dependent variable is regressed on two inde- pendent variables. It is possible that the hypoth- eses Ho : B1 = 0 and Ho: By = 0 cannot be rejected at low significance levels, yet the hypothesis Ho : B1 = B2 = 0 can be rejected at a very low signif- icance level. In what circumstances might this result arise

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