Mark Scheme (Results)
Summer 2023
Pearson Edexcel GCE
In Statistics (9ST0)
Paper 02: Statistical Inference
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body.
We provide a wide range of qualifications including academic, vocational, occupational and
specific programmes for employers. For further information visit our qualifications
websites at www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch
with us using the details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of learning,
for all kinds of people, wherever they are in the world. We’ve been involved in education
for over 150 years, and by working across 70 countries, in 100 languages, we have built an
international reputation for our commitment to high standards and raising achievement
through innovation in education. Find out more about how we can help you and your
students at: www.pearson.com/uk
Summer 2023
Publications Code 9ST0_02_2306_MS
All the material in this publication is copyright
© Pearson Education Ltd 2023
,General Marking Guidance
All candidates must receive the same
treatment. Examiners must mark the first candidate
in exactly the same way as they mark the last.
Mark schemes should be applied positively.
Candidates must be rewarded for what they have
shown they can do rather than penalised for
omissions.
Examiners should mark according to the mark
scheme not according to their perception of where
the grade boundaries may lie.
There is no ceiling on achievement. All marks on the
mark scheme should be used appropriately.
All the marks on the mark scheme are designed to
be awarded. Examiners should always award full
marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to
award zero marks if the candidate’s response is not
worthy of credit according to the mark scheme.
Where some judgement is required, mark schemes
will provide the principles by which marks will be
awarded and exemplification may be limited.
When examiners are in doubt regarding the
application of the mark scheme to a candidate’s
response, the team leader must be consulted.
Crossed out work should be marked UNLESS the
candidate has replaced it with an alternative response.
, General Marking Guidance
Total marks
The total number of marks for the paper is 80.
Mark types
The Edexcel Statistics mark schemes use the following types of marks:
M Method marks,
awarded for ‘knowing a method and attempting to apply it’,
unless otherwise indicated.
A Accuracy marks can only be awarded if the relevant method
(M) marks
have been earned.
B Unconditional accuracy marks are independent of M marks
E Explanation marks
NOTE: Marks should not be
subdivided.
Abbreviations
These are some of the marking abbreviations that will appear in the mark
schemes.
ft follow through
PI possibly implied
cao correct answer only
cso correct solution only
(There must be no errors in this part of the question)
awrt answers which round to
awfw answers which fall within (a given range)
SC special case
nms no method shown
oe or equivalent
dep dependent (on a given mark or objective)
dp decimal places
sf significant figures
🞸The answer is printed on the paper
Summer 2023
Pearson Edexcel GCE
In Statistics (9ST0)
Paper 02: Statistical Inference
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body.
We provide a wide range of qualifications including academic, vocational, occupational and
specific programmes for employers. For further information visit our qualifications
websites at www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch
with us using the details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of learning,
for all kinds of people, wherever they are in the world. We’ve been involved in education
for over 150 years, and by working across 70 countries, in 100 languages, we have built an
international reputation for our commitment to high standards and raising achievement
through innovation in education. Find out more about how we can help you and your
students at: www.pearson.com/uk
Summer 2023
Publications Code 9ST0_02_2306_MS
All the material in this publication is copyright
© Pearson Education Ltd 2023
,General Marking Guidance
All candidates must receive the same
treatment. Examiners must mark the first candidate
in exactly the same way as they mark the last.
Mark schemes should be applied positively.
Candidates must be rewarded for what they have
shown they can do rather than penalised for
omissions.
Examiners should mark according to the mark
scheme not according to their perception of where
the grade boundaries may lie.
There is no ceiling on achievement. All marks on the
mark scheme should be used appropriately.
All the marks on the mark scheme are designed to
be awarded. Examiners should always award full
marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to
award zero marks if the candidate’s response is not
worthy of credit according to the mark scheme.
Where some judgement is required, mark schemes
will provide the principles by which marks will be
awarded and exemplification may be limited.
When examiners are in doubt regarding the
application of the mark scheme to a candidate’s
response, the team leader must be consulted.
Crossed out work should be marked UNLESS the
candidate has replaced it with an alternative response.
, General Marking Guidance
Total marks
The total number of marks for the paper is 80.
Mark types
The Edexcel Statistics mark schemes use the following types of marks:
M Method marks,
awarded for ‘knowing a method and attempting to apply it’,
unless otherwise indicated.
A Accuracy marks can only be awarded if the relevant method
(M) marks
have been earned.
B Unconditional accuracy marks are independent of M marks
E Explanation marks
NOTE: Marks should not be
subdivided.
Abbreviations
These are some of the marking abbreviations that will appear in the mark
schemes.
ft follow through
PI possibly implied
cao correct answer only
cso correct solution only
(There must be no errors in this part of the question)
awrt answers which round to
awfw answers which fall within (a given range)
SC special case
nms no method shown
oe or equivalent
dep dependent (on a given mark or objective)
dp decimal places
sf significant figures
🞸The answer is printed on the paper
