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GCSE Statistics · key term
A value showing how many standard deviations a raw value lies above or below its own data set's mean, calculated using .
Used by Edexcel
Specification 2c.06 · Paper 1, Paper 2
Revise: Standardising comparative dataThe raw value, mean and standard deviation must use matching units. Those units cancel in the division, so a standardised score has no units.
Compare the standardised scores, then explain what the comparison means in context. A higher standardised score is better only when a higher raw value is desirable.
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