The grouped mean came to 62 while the exact mean was 59.3 because of t…

Question

The grouped mean came to 62 while the exact mean was 59.3 because of the:

Accepted Answer

B. Mid-point assumption

1. Grouping assumes each class is centred at its mid-point.
2. That makes the grouped mean approximate.
3. 59.3 is exact and 62 approximate.
_Source: syllabus Mathematics, Chapter 14, Statistics._

Answer

Wrong frequencies

Answer

Rounding of marks

Answer

Missing students

The grouped mean came to 62 while the exact mean was 59.3 because of the:

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