Answer: 3.
- A 3
- B 2
- C 4
- D 5
Correct answer: A. 3
Explanation: The mode is the most frequently occurring value; 3 appears twice, more than any other.
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