Answer: 7.
- A 5
- B 7
- C 9
- D 11
Correct answer: B. 7
Explanation: For 5 values (odd count), median is the 3rd value in order = 7.
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