Question

Find the area under the standard normal curve to the left of z = −2.8 and to the right of z = 2.06

Answer 1

z₁ = -2.8 correspond to an area of = 0.0026
z₂ = 2.06 correspond to an area of = 0.9750

z₁ ≤ Area ≤ z₂  ↔ z₂ - z₁ = 0.9750 - 0.0026 = 0.9724
Answer Area = 0.9724