statistics
posted by ana .
find the probability p(1.14 < z < 1.01)
using the normal standard distribution

Look up a standard normal distribution table, or use the following link:
http://www.math.unb.ca/~knight/utility/NormTble.htm
The lefttail probability
P1=P(< 1.14σ) = 0.1271
and the lefttail probability
P2=P(< +1.01σ) = 0.8438
So
P(1.14σ < z < 1.01σ)=P2P1