Concept:An ogive (cumulative frequency curve) is a graphical method to locate partition values such as median, quartiles, and percentiles.
Explanation:Ogive does not directly give mean or mode.
Mean requires arithmetic calculation, not graphical reading from an ogive.
Mode is obtained from a histogram, not an ogive.
Quartiles (including median) can be directly read from an ogive by locating cumulative frequencies.
Thus, ogive is used to obtain quartiles.
Answer:C. Quartiles