Question

Vine what is the by that the same means of the time of reis sed to decimal

Answer 1

^ ) 2 (Utd)-ie X W NIM, -²) sampling Istribution of sample mean fatto X AN(l So, probability of sample mean of sample mean being within I d of population mean is.. P(M-d LXL M+d) = P( (ll-d) - " <z2 dvn) = P(Z <dv) - Plz<-dvo) = (1-P ( 23 d)] – Plzeda) :P(-dun くく din - din

-dva using symmetry me can say that! - Przy din ) = P(ZL So, pll-d< F<Mtd): 1-2P122-dra) a) for d = 500, o=5000, n=fo, the required probability is - Pa 1-2P(Z <-Soo x V6 500X v60) 1-2P(Z -0.7746) = 1-2 (0.9206) = 10.5558 and b) for d=500, 6=500, n=120 -- P = 1-2P(Z < -500 V120 5000 - 1 - 2P (z<-1.0954) - 1-2(0.1368) 0.7264