Question

Z table work with given standard deviation and average(mean)

1.   Given μ_X = 750, σ_X = 80

        a) Find the two X values that are 2.7 SD away from the mean

        b) Find X1 if p(720 < X < X1) = .428

        c) Find X0 if p(X0 < X < 910) = .347

        d) Find p((X < 700) or (X > 900)) (sum required)

        e) Find any X0 and X1 s.t. p(X0 < X < X1) = .338

        f) Find the value of X that is 3.8 SD below X = 725

       

2. a) Find Z1 s.t. p(Z < Z1) = .675  

      b) Find Z1 s.t. p(-2.48 < Z < Z1) = .3831

      c) Find Z1 s.t. p(Z > Z1) = .2015

      d) Find Z0 s.t. p(Z0 < Z < .77) = .334

Answer 1