¯F 5-6 Mean :¯ ¯ , 137 , 5I ¯ 134 :2 M 134 , 130 , 125 , I¯ F ÷ =¯ F ¯ : M ¯F :1 M 132 = 5 ÷ 660 660 = 137 + 134 + 130 + 125 + 134 132 I ¯ F ¯ ¯ ,¯F ¯ ¯ ¯ ¯ ¯ ¯ ¯ F 1 4¯ : M ¯F F 2 36 = 6 + 18 + 12 = 3 3= 12 = 3 ÷ 36 = ¯ 12 ¯ F ,¯ F ï M ¯¯ ¯ 140