Pearson Edexcel GCE
In Statistics (9ST0)
Paper 02: Statistical Inference
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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
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