To find the value of z for which the cumulative probability is 0.1003, we can use a standard normal distribution table or a statistical calculator.
Using a standard normal distribution table, we can look up the value closest to 0.1003. The closest value is 0.1003, which corresponds to z ≈ -1.28.
Therefore, P(Z < -1.28) is approximately equal to 0.1003.