Lcase studies(P77-78) Use of t and F-tests to test hypotheses nvolving multiple parameters Joint tests on several regression parameters Suppose that we have a model Y=B+B2X2+…+B k-qk-qPk-q+lk-a+y+. +BX,+8 And the null hypothesis is Bbo:B-=…=k=0 2021/2/202021/2/20 9 case studies(P77-78) Use of t and F-tests to test hypotheses Involving multiple parameters 1. Joint tests on several regression parameters: Suppose that we have a model And the null hypothesis is 1 2 2 1 1 k q k q k q k q k k Y X X X X       − − − + − + = + + + + + + + 0 1 : 0 H k q k   − + = = =