Calculate the probability that the standard normal random va

Calculate the probability that the standard normal random variable will assume a value between 0.43 and 2.20.

Solution

z1 = lower z score =    0.43      
z2 = upper z score =     2.2      
          
Using table/technology, the left tailed areas between these z scores is          
          
P(z < z1) =    0.666402179      
P(z < z2) =    0.986096552      
          
Thus, the area between them, by subtracting these areas, is          
          
P(z1 < z < z2) =    0.319694373   [ANSWER]