WGU statistics QUESTIONS AND ANSWERS
The probability of any event is For any event A, 0 ≤ P(A) ≤ 1.
between one and o. What is
the equation for this?
The sum of all possible One, the equation is :P(S) = 1
probabilities is___?
What is the complement rule? P(not A) = 1 - P(A)
or the probability that an event
does not occur is 1 minus the
probability that it does occur.
In probability, "OR" means P(A or B) = P(event A occurs or event B occurs or both occur)
either one or the other or
both.
Two events that cannot occur disjoint or mutually exclusive
at the same time are called
The Addition Rule for Disjoint If A and B are disjoint events, then P(A or B) = P(A) + P(B).
Events:
P(A and B) = P(event A occurs and event B occurs)
The idea of disjoint events is is about whether or not it is possible for the events to occur at the
same time
whether or not the events affect each other in the sense that
The idea of independent events
the occurrence of one event affects the probability of the
is about
occurrence of the other
If A and B Disjoint A and B can not be indepentdent
If A and B are two independent P(A and B) = P(A) * P(B).
events (Multiplication Rule)
if A, B and C are three P(A and B and C) = P(A) P(B) P(C)
independent events,
The Complement Rule, P(A) = 1 - P(not A),
, P(L) = 1 - P(not L) = 1 - P(not O1 Applying the Multiplication rule:Now, using the multiplication rule, = 1 -
and not O2 and not O3 and not (.56 .56 .56 .56
O4 and not O5 and not O6 .56 .56 .56 .56 .56 * .56) = 1 - .003 = .997.
and not O7 and not O8 and
not O9 and not O10).
The probability of any event is For any event A, 0 ≤ P(A) ≤ 1.
between one and o. What is
the equation for this?
The sum of all possible One, the equation is :P(S) = 1
probabilities is___?
What is the complement rule? P(not A) = 1 - P(A)
or the probability that an event
does not occur is 1 minus the
probability that it does occur.
In probability, "OR" means P(A or B) = P(event A occurs or event B occurs or both occur)
either one or the other or
both.
Two events that cannot occur disjoint or mutually exclusive
at the same time are called
The Addition Rule for Disjoint If A and B are disjoint events, then P(A or B) = P(A) + P(B).
Events:
P(A and B) = P(event A occurs and event B occurs)
The idea of disjoint events is is about whether or not it is possible for the events to occur at the
same time
whether or not the events affect each other in the sense that
The idea of independent events
the occurrence of one event affects the probability of the
is about
occurrence of the other
If A and B Disjoint A and B can not be indepentdent
If A and B are two independent P(A and B) = P(A) * P(B).
events (Multiplication Rule)
if A, B and C are three P(A and B and C) = P(A) P(B) P(C)
independent events,
The Complement Rule, P(A) = 1 - P(not A),
, P(L) = 1 - P(not L) = 1 - P(not O1 Applying the Multiplication rule:Now, using the multiplication rule, = 1 -
and not O2 and not O3 and not (.56 .56 .56 .56
O4 and not O5 and not O6 .56 .56 .56 .56 .56 * .56) = 1 - .003 = .997.
and not O7 and not O8 and
not O9 and not O10).
