8482542
Description
Flashcards by Chloe Drewery, updated more than 1 year ago
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Created by Chloe Drewery
over 7 years ago
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| Question | Answer |
| 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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