O-LevelMathematicsStatistics4024/23 · May/June 2025 · Q166 Marks
The table gives information about the ages of the 80 members of a gym. Age (a years) | 16 < a ≤ 18 | 18 < a ≤ 24 | 24 < a ≤ 40 | 40 < a ≤ 100 Frequency | 5 | 31 | 19 | 25
- (a)Calculate an estimate of the mean age.[4]
- (b)Work out the percentage of the members of the gym who are more than 24 years old.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.
- [4] 38.675 oe
- M1 for correct midpoints soi
- M1 for use of Σfx where x is in the correct interval including boundaries
- M1 (dep on 2nd M1) for Σfx ÷ 80
- [2] 55
- M1 for (19 + 25) / 80 [×100] oe
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →