For the sign test,we need to impose only the following conditions on this model. 。S,≥0 for all j=l,…,k s,>0 for at least onej=1,...k ·The median(中位数)of each“noise”sample is zero.i.e. ro-∫nuh2 (9.4) 6
6 For the sign test, we need to impose only the following conditions on this model. • for all • for at least one • The median(中位数) of each “noise” sample is zero. i.e. 0 j s j k =1, , 0 j k =1, , j s 0 0 1 (0) ( ) (9.4) 2 j F p n dn n j j − = =
/936 e.g. P(x) 0.5 Median-0 0.25 Mean=1/4 2 X -1 axh=小rxh-支mad=0 med 4=jw=05可+025可=4 7
7 0 2 1 0 1 ( ) 0.5 0.25 4 xp x dx xdx xdx − − = = + = x p(x) -1 2 0.25 0.5 Median=0 Mean=1/4 e.g. 1 ( ) ( ) , 0 2 med med p x dx p x dx med − = = =