Mathematics · May / June 2022 · Paper 42 · Question 7
0580
As printed in the paper
The question as text
Information about the mass, m kg, of each of 150 children is recorded in the frequency table. Mass (m kg) m 0 10 1 G m 10 20 1 G m 20 25 1 G m 0 25 4 1 G m 40 0 5 1 G Frequency 12 38 32 50 18
Read automatically from the paper; the printed page above is exact.
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7(a)[4]
25.2 or 25.23… [4]
M1 for midpoints soi
M1 for use of ∑fx with x in correct interval including both boundaries M1 (dep on 2nd M1) for ∑fx ÷ 150
7(b)[4]
5 correct blocks [4]
B3 for 4 correct blocks
or B2 for 3 correct blocks
or B1 for 2 correct blocks or block widths 10, 10, 5, 15, 10 If 0 scored
SC1 for 4 correct frequency densities from 1.2, 3.8, 6.4, 3.33[3…] and 1.8 oe soi
7(c)(i)[2]
12, 50, 82, 132, 150 [2]
B1 for 3 or 4 correct
7(c)(ii)[2]
92 [2]
M1 for 150 −12 oe seen If 0 scored,
SC1 for answer 8[%]
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