For a standard normal variable ZZZ, find P(Z<−1)P(Z < -1)P(Z<−1) given that P(Z<1)≈0.8413P(Z < 1) \approx 0.8413P(Z<1)≈0.8413.
0.84130.84130.8413
0.15870.15870.1587
0.50000.50000.5000
0.42060.42060.4206