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Paper 1Statistical Techniques6 marks
A grouped frequency distribution shows the number of students in different age groups at a school. The class intervals and frequencies are: 10–14 years: 15 students, 15–19 years: 25 students, 20–29 years: 10 students. The class widths are unequal.
Data Table
Grouped Frequency Distribution of Students by Age
Number of students in each age group
| Age group (years) | Frequency |
|---|---|
| 10–14 | 15 |
| 15–19 | 25 |
| 20–29 | 10 |
- a[3]
Calculate the frequency density for each age group.
Aim for approximately 3 distinct marking points.
- b[3]
Interpret what the histogram bars would show about the distribution of students across age groups.
Aim for approximately 3 distinct marking points.
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