Question

find the area under the curve and between z=0.64 and z=2.23

Answer 1

P(0.64<z<2.23) = P(z<2.23) – P(z<0.64)

P(z<2.23) = 0.9871

P(z<0.64) = 0.2611

P(0.64<z<2.23) = 0.9871 – 0.2611 = 0.726