Mathematics · Oct / Nov 2021 · Paper 41 · Question 3
0580
As printed in the paper
The question as text
The cumulative frequency diagram shows information about the mass, m kg, of each of 80 boys. 0 30 40 50 60 Mass (kg) 70 80 90 20 40 60 80 Cumulative frequency m
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
3(a)[4]
Correct box-and-whisker plot [4]
B1 for lowest value and highest value at 30 and 90
B1 for LQ and UQ at 50 and 72
B1 for median at 63
3(b)(i)[2]
56 [2]
M1 for 24 soi
3(b)(ii)[2]
16 [2]
B1 for 64 written
3(c)(i)[1]
14, 22 [1]
3(c)(ii)[4]
61.5 [4]
M1 for 35, 45, 55, 65, 75, 85 soi
M1 for fx Σ M1 dep for their fx Σ ÷ (8 + 12 +their 14 + their 22 + 14 +10) or fx Σ ÷ 80
3(c)(iii)[3]
35 69 oe [3]
10 14
M2 for [2]
24 × oe 23
or M1 for 10 24 or 14 24 oe seen If 0 scored,
SC1 for answer 35 72 oe
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