To solve this problem, what we can do first is to find for the value of
probability (p value) using the standard distribution tables for z. Looking at
the table, we can see that the p values are:
when z = - 2.41:
p value = P (z = - 2.41) = 0.0080
when z = 0:
p value = P (z = 0) = 0.5000
The probability that z lies between – 2.41 and 0 is the difference of the
two probabilities, with the bigger probability subtracted by the smaller
probability. That is:
P (0 ≥ z ≥ -2.41) = 0.5000 - 0.0080
P (0 ≥ z ≥ -2.41) = 0.4920
