Attention Math

Class 10 · Chapter 13 · Statistics and probability

Statistics

Mean, mode and median of grouped data: choosing the right stand-in for each class.

Source: NCERT Mathematics, Class 10

  1. 13.1Mean of Grouped DataAttention · Look at the class mark: the middle of each class.10 min
  2. 13.2Mode of Grouped DataAttention · Look for the highest frequency: the tallest bar.10 min
  3. 13.3Median of Grouped DataAttention · Look at the running totals: find where they pass n/2.12 min

Problems

The clue is in the question

All 1 problem
  1. 1Finding the median classThe marks of 40 students are grouped: 0–10: 4, 10–20: 14, 20–30: 8, 30–40: 9, 40–50: 5. Find the median mark.Lens · The landmarkPractice (NCERT style)