A level Statistics Paper 4 MARK SCHEME - Naiker | Maths...NB isMO for 33 only NB 27 x 32_7___ which...
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www.naikermaths.com A level Statistics Paper 4 MARK SCHEME Question 1
Transcript of A level Statistics Paper 4 MARK SCHEME - Naiker | Maths...NB isMO for 33 only NB 27 x 32_7___ which...
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A level Statistics Paper 4 MARK SCHEME Question 1
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Question 2
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Question 3
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Question 4
Question Number Scheme Marks
‘tr’ should interpreted as a trace, which means a small amount
The critical value is the first value to fall inside of the critical region
R=-0.473 (3 s.f), treating ‘tr’ values as zero
The data show a weak negative correlation so a liner model may not be
best;
there may be other variable affecting the relationship or a different model
might be a better fit
Question 5
Q5 Scheme Marks
a r = 0.340 (3 s.f) (1)
4a H0 : 𝜌 = 0, H1 : 𝜌 ≠ 0
Critical value = ±0.6319
B1
M1
A1
(3)
(4 marks)
A1
a (i(ii====a=
A1
A1
(ii====a=
b (ii====a=
A1
A1 c (ii====a=
b
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