Mark Scheme
Summer 2025
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
June 2025
Question Paper Log Number 76382
Publications Code 9ST0_01_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
, 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 2025
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
June 2025
Question Paper Log Number 76382
Publications Code 9ST0_01_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
, 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
