Answer: 0.
- A 5
- B 1
- C 0
- D 25
Correct answer: C. 0
Explanation: All values equal the mean (5). All deviations are zero. Variance = 0.
In a perfectly normal (bell-shaped) distribution, mean, median, and mode all coincide at the centre; about 68% of data falls within 1 standard deviation of the mean, 95% within 2, and 99.7% within 3 - the empirical rule used to judge how typical or extreme a value is.
Concept context
Mean, median, mode, standard deviation, and data interpretation