μ = 5, σ = 4 ; calculate P(0 < x < 8) This is the same as P(x < 8) - P(x < 0). P(x < 8) using our calculator is 0.773373 P(x < 0) using our calculator is 0.10565 So we have 0.773373 - 0.10565 = 0.667723