Answer: 6.
- A 0
- B 6
- C 30
- D 5
Correct answer: B. 6
Explanation: When all values are the same, mean = that value = 6.
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