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5.2 Graphical Presentation & Diagrams — Test 1
Q1. A histogram is used to display the frequency distribution of:✓ Continuous (grouped) data using adjacent bars
Q2. A bar diagram differs from a histogram in that a bar diagram has bars that:✓ Are separated by gaps and represent categorical data
Q3. A pie chart represents data as:✓ Sectors of a circle proportional to the values
Q4. In a pie chart, the angle of a sector is calculated as:✓ (Value ÷ total) × 360°
Q5. An ogive is a graph of:✓ Cumulative frequency
Q6. A pictogram represents data using:✓ Pictures or symbols
Q7. A scatter diagram is used to show the:✓ Relationship between two variables
Q8. A frequency polygon is formed by:✓ Joining the midpoints of the tops of histogram bars
Q9. In a histogram, the area of each bar is proportional to the:✓ Frequency of that class
Q10. The median of a grouped distribution can be read graphically from the:✓ Ogive (cumulative frequency curve)
Q11. A 'less than' ogive is obtained by plotting cumulative frequencies against the:✓ Upper class boundaries
Q12. Graphical presentation of data is valuable mainly because it:✓ Makes patterns and comparisons easy to see at a glance
Q13. A line graph is most suitable for showing:✓ Changes or trends over time
Q14. Bar diagrams are most appropriate for displaying:✓ Comparisons among distinct categories
Q15. A frequency curve is a smoothed version of a:✓ Frequency polygon
Q16. When the data are categorical (e.g. blood groups), an appropriate diagram is a:✓ Bar diagram or pie chart
Q17. The point where the 'less than' and 'more than' ogives intersect gives the:✓ Median
Q18. In a pictogram, a partial (incomplete) symbol is used to represent:✓ A value that is a fraction of the unit a full symbol represents
Q19. The choice of an appropriate graph or diagram depends mainly on the:✓ Type of data and the purpose of presentation
Q20. Match each graph/diagram with its main use and select the correct option.✓ A-iii, B-i, C-iv, D-ii