(2 points) Which of the following are true about all normal distributions? Check all that apply
• A. They have one large tail. • B. They are bimodal. • C. They have no major outliers. • D. They are categorically sharp.
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