**TI83F*  SIGNTEST á?Þ*1)ALT:)XlY*+*2)ALT:)XkY*+*3)ALT:)XoY*?ÜC?0N?0K?ÓI+1+µ]?Î]Io]I?Ï?Np1N?Ô?Î]Ik]I?Ï?Kp1K?Ô?Ô?¶#»N+:50+I+I+0+KL?¶#»N+:50+I+I+K+NR?á?ÎNj0?Ï?Þ*NO)DIFFERENCES*?Ð?Þ*POS:)CHANGES+*?Þ*CHANGES*?ÞK+N ?Þ*P)VALUE*?ÎCj1?Ï?ÞL?Ð?ÎCj2?Ï?ÞR?Ð?Þ2‚L+R?Ô?Ô/U