(a) Show this information in a stem and leaf diagram.(3)
(b) Find the median number of stickers. (2)
Mark scheme (a)
Answer
Mark
Mark scheme
Diagram
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)
B1
for correct key eg 7 | 1 or 70 | 1 represents 71 Key must be consistent with the stem
Additional guidance
Accept stem of 70, 80, 90, 100 Can be in reverse vertical order (with matching leaves) eg 10, 9, 8, 7 Errors can be omissions; one number in the wrong position is one error.
Mark scheme (b)
Answer
Mark
Mark scheme
86
M1
for identifying the median, eg “6” circled or an answer of 6 or ft their list or diagram for selection of middle value (allow up to two errors or omission in listing)
A1
for 86 or ft their list or diagram for selection of middle value (allow up to two errors or omission in listing)
