Answer to Question #121063 in Statistics and Probability for Shane Jessica Ballera

Question

A z-score of 3 is approximately how many standard deviations above the mean?
Answer and rationalization:

Answer 1

• A positive z-score says the data point is above average.
• A negative z-score says the data point is below average.
• A z-score close to 0 says the data point is close to average.
• A data point can be considered unusual if its z-score is above 3 or below -3.

Answer: z score of 3 is 3 standard deviations above the mean .