Answer: Ogive.
- A Histogram
- B Frequency polygon
- C Ogive
- D Bar chart
Correct answer: C. Ogive
Explanation: An ogive (cumulative frequency curve) plots cumulative frequency vs. class boundaries.
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