1. What is the z-score for an lower-tail probability of.20?
a. -2.054
b. -0.842
c. 0.508
d. 0.579

2. What Is the z-score for a upper-tail probability of .10?
a. 1.645
b. -1.96
c. 1.282
d. -2.326

3. What is the probability for the region where z ≤ 1.5?
a. .067
b. .866
c. .933
d. almost 1

4. What Is the probabllity for the region where z ≥ -2.25?
a. 0.012
b. 0.976
c. 0.988
d. almost 1