Common Mistakes to Avoid

⚠️ Common Mistakes to Avoid

Table Construction:

• ❌ Using lower boundaries: Always use upper boundaries for grouped data
• ❌ Wrong running total: Each cumulative frequency must include all previous frequencies
• ❌ Final total doesn't match: Check your addition carefully

Graph Drawing:

• ❌ Straight lines: Should be smooth curves, not straight line segments
• ❌ Wrong starting point: Curve doesn't start at appropriate point
• ❌ Poor scale choice: Makes reading values difficult

Reading Values:

• ❌ Wrong direction: Going vertically first instead of horizontally
• ❌ Incorrect positions: Using wrong formula for quartile positions
• ❌ Inaccurate reading: Not following construction lines carefully