Which of the following are true about all normal distributions? Check all that apply
A. They are bimodal.
B. They have one peak.
C. They have one large tail.
D. They have no major outliers.

---

The z-score corresponding to an observed value of a variable tells you the number of standard deviations that the observation is from the mean
A. True
B. False

---

A positive z-score indicates that the observation is
A. above the mean
B. below the mean