Find the area under the normal distribution curve given the z-score or interval.

3. -2.61 < z < 2.61

Find the z-scores that satisfies the condition.Show any calculations that you use. Please explain how you are determining when you make the z-score negative and when to make the z-score positive.

7. The z-score for the cumulative 20% of the data distribution.

8. The z-score for the upper 20% of the data distribution.

9. The z-score that corresponds to a cumulative value of .3974

10.The z-score that represents the cumulative value of .2984