PORTAGE STATISTICS MODULE 3 EXAM 100% SOLVED

PORTAGE STATISTICS MODULE 3
EXAM 100% SOLVED
Probability Range - ANSWER0-1.0, closer to 1.0 for an event the greater likelihood the
event will occur. 0.0 the lower the likelihood that event will occur. 0.5 indicates the
likelihood the event happens is equal to the likelihood the event does not occur

Experiment - ANSWERprocess or activity that generates observable well-defined
otucomes

Sample Point - ANSWEREach outcome of an experiment

Sample Space - ANSWERThe set of all possible outcomes an experiment may produce

It is in form of a set and written as
S= {list of sample points} ex: S={heads,tails}

Probability distribution - ANSWERlists outcomes of a probability experiment with the
probability for each outcome

Probability Rules - ANSWER1) probability for each outcome is between 0-1 inclusive
Ei(single event)
P(Ei) probability of an event
0 <_ P(Ei) <_ 1 for each i

2) sum of probabilities for all outcomes will equal 1
P(E1)+P(E2)...+P(En) = 1

Calculating Probability - ANSWERClassic Method & relative frequency method
(empirical method)

Classical Method for calculating probability - ANSWERUsed when all outcomes of
sample space are equally likely to occur
Equally likely- n possibilities, 1/nth is the probability of occurring if chances are all the
same
ex
S={1 2 3 4 5 6}
n=6
P(1)=1/6, P(2)=1/6.. so on

Relative Frequency Method/Empirical method of assigning probability - ANSWERFreq
calculated by dividing numbers an event occurs divided by the total number of trials