rk: Chapter 8 (Sections 81 through 8.5) Saved Calculate the standard error. May normality be assumed? (Round your answers to 4 decimal places.) Standard Error Normality (a) n = 30, IT = 0.50 (b) n = 50, IT = 0.20 n = 100, IT = 0.10 d) n = 500, I = 0.005