STA2260 Flashcards
1
Q
Standard Variance (Computational)
A
(sum (x^2) - (sum x)^2/n)/(n-1)
2
Q
Complement
A
All outcomes that are not event A. !A or A must happen.
P(A) + P(!A) = 1
P(A) = 1 - P(!A)
P(!A) = 1 - P(A)
3
Q
Disjoint
A
Mutually exclusive. The events CAN NOT both occur.
P(A n B) = 0, P(A u B) = P(A) + P(B)
