Answer: Median.
- A Mean
- B Mode
- C Median
- D First quartile
Correct answer: C. Median
Explanation: The 50th percentile = Q2 = median. It divides the data into equal halves.
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