STATISTICS Key Formulas

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Statistics Formulas for OCR MEI S1
Chloe Drewery
Fichas por Chloe Drewery, actualizado hace más de 1 año
Chloe Drewery
Creado por Chloe Drewery hace alrededor de 7 años
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Resumen del Recurso

Pregunta Respuesta
MEAN MEAN = The sum of all the values / The total number of values.
SUM OF SQUARES Sxx = Sum of (X-Mean)squared / n
VARIANCE S^2 = Sxx / n-1
MEAN SQUARE DEVIATION MSD = Sxx / n
ROOT MEAN SQUARE DEVIATION The square root of Sxx / n
STANDARD DEVIATION The square root of Sxx / n-1
OUTLIER TEST Either 1.5 x IQR or Mean ± 2s
PROBABILITY OF A AND B P(AandB)
PROBABILITY OF A OR B P(AUB)
PROBABILITY OF NOT A 1 - P(A)
PROBABILITY OF A OR B P(A) + P(B) - P(AandB)
PROBABILITY OF B GIVEN A P(BIA) = P(AandB) / P(A)
EXPECTED VALUE OF X E(X) = Sum of Xi Pi
VARIANCE OF X Var(X) = E(X^2) - (E(x))^2
COMBINATIONS n! / (n - r)! r!
PERMUTATIONS n! / (n - r)!
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