The tail menu is used to tell Stat Solver the area under the normal curve to be computed. Pick the item that most closely represents the area you desire.
Left Bounds is the left most z score. If the left bound is infinity, leave the box blank.
Right Bounds is the right most z score. If the right bound is infinity, leave the box blank.
The result will be the probability of a normally distributed event falling in the area indicated in the boxes.
