Foundation June 2022 Paper 1 Q21
21 Here are the ages, in years, of 15 people.
| 19 | 28 | 29 | 33 | 27 |
| 27 | 37 | 25 | 27 | 37 |
| 17 | 45 | 47 | 25 | 26 |
Show this information in a stem and leaf diagram. (3)
| Answer | Mark | Mark scheme | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| B2 | for a fully correct ordered diagram | ||||||||
| (B1 | for a complete unordered diagram or for an ordered diagram with at most one error or omission) | |||||||||
| Key: eg 2|5 = 25 or 20|5 = 25 | B1 | for correct key (units not required but must be correct if stated) eg 2|5 or 20|5 represents 25 (years) |
Additional guidance
Accept stem of 10, 20, 30, 40
Can be in reverse vertical order (with matching leaves) eg 4, 3, 2, 1
Errors can be omissions; one number in the wrong position is one error.
Key must be consistent with the stem