"115475" - 1 õppematerjal

Juhuslikud sündmused

1 1 2 s y2 = y i2 n yi - y B = (15 2 5 + 25 2 10 + 35 2 54 + 45 2 17 + 55 2 14) - 37,5 2 = n 100 150300 = - 37,5 2 = 1503 - 1406,25 = 96,75 . 100 B ( x) = s x2 = 27,628 = 5,256 . B ( y ) = s y2 = 96,75 = 9,836 . r = n x - nx = 115475 - 100 29,65 37,5 = 0,829 . n ( ) ( ) 100 29,65 37,50 , y x  9,836 - 37,5 = 0,829 ( - 29,65) . 5,256 133. a = 0,95 , x0, n . x0 = 60,4 , n = 81 , = 6 . . x0 - < a < x0 + , 2 62 6 = 1,96 = 1,96 = 1,96 = 1,307 .