1) Find the area under the standard normal curve between z = -1.25 and z = 1.25
2) Find the area under the standard normal distribution between z = -2.40 and z = -0.43
3) Find the following normal probability: P( z > 3.07 )
4) Find the z-score that is greater than the mean and for which 15% of the standard normal distribution's area lies to its right.
5) For the standard normal distribution, find the z-score that corresponds to the 90th percentile.