< previous page page_82 next page >

Page 82
or
C0098-01.gif
where the fact that (N - 2n*) ~ (N - n*) has been used, with the inequality generally holding as soon as N1 exceeds n* by a small integer. We obtain a recursion for an ever better approximation to n*as a function of N1by rewriting this as
C0098-02.gif
Whence
C0098-03.gif
where, again, the error rapidly approaches zero as N increases. Finally, where it is desirable to have n* approximated by an explicit function of N, the steps here can be redone in terms of N/n*,noting that N1/n* rapidly approaches N/n* as N increases. Then
C0098-04.gif
where, still, the error rapidly approaches zero as N increases.
The expected loss per trial L*(N)when n* trials have been allocated to x(2)(t, N)is
C0098-06.gif

 
< previous page page_82 next page >

If you like this book, buy it!