Answer: 5.
- A 4
- B 5
- C 6
- D 7
Correct answer: B. 5
Explanation: Even number of values: median = average of 2nd and 3rd = (4+6)/2 = 5.
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