, , . - (). , , , . (m) (m). : n 30
MM = ; Mp= , - , , g= 100%-% ( ) 1000% - % ( )
n 30 MM = ; Mp=
(n)
, , . () , , .. . P = P tm ( ), = tm ( ), - , , m , t . , ( n>30, , . 1) t ( n<30, , . 2). t n -1. - 95% (Pt =0,95), = 0,05. , , 99% (Pt =0,99, = 0,01) 99,9% (Pt =0,999, = 0,001). , .
, . . t . , . () , . t = t=
95%, .. 2 ( n >30). , ( , ).