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Appendix C: Answers to Selected Problems                        387

               (b)
                                                           1
                                                        !
                                                    n
                               ^
                                           ^
                                                   X
                            EfBgˆ  ;   varfBgˆ   2     x 2  ;
                                                        i
                                                    iˆ1
               (c)
                                            n
                                        1  X          2
                                                   ^
                                 c 2
                                   ˆ          …Y i   Bx i †
                                      n   1
                                           iˆ1
                       n
                     1  X             2          n   2
                                   ^
                               ^
                                                       2
                c 2
                                           c 2
           11.3   ˆ        Y i   A   Bx i ) , Ef  gˆ    , hence biased.
                     n                            n
                       iˆ1
           11.7 14:98 ‡ 32:14 log v
                               10
                                ^
           11.9  a) ^   ˆ 1:486 and   ˆ 0:022,   b) l 1 ˆ 0:006,   c) Not significantly dif-
                ferent from zero
                           ^
                                    ^
                ^
           11.11   0 ˆ 66:18,   1 ˆ 0:42,   2 ˆ 46:10
                                                            ^
                                                 ^
                                      ^
                            ^
                ^
           11.13   0 ˆ 717:18,   1 ˆ 10:84,   2 ˆ 3:78,   3 ˆ 1:57,   4 ˆ 0:38




























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