Question 927260
Population: mean = .9, sd = 1.1
sample n = 80, SE = 1.1/sqrt(80) = .123
P(xbar &#8804; 1.5) = P( z < .6/.123) = P(z < 4.878) = normalcdf(-100, 4.878)= .9999
.......
xbar = 90/80 = 1.125
P(xbar &#8804; 1.125) = P(z < .225/.123) = P( z <1.8293) = normalcdf(-100, 1.8293) = .9663
.......
1.1(invNorm(.97) + .9 = x
1.1(1.88) + .9 = 2.968  0r 3 children
........
Using a TI calculator 0r similarly a Casio fx-115 ES plus