Answer: 4.
- A 2
- B 4
- C 6
- D 12
Correct answer: B. 4
Explanation: Using mode = 3·median − 2·mean = 24 − 20 = 4.
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