Stats Test 2
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Sample Space and Sample Point..
S= {Heads, tails} < sample point

Relative Frequency..
Past Data
Frequency/Total sample size

Classical..
Assumed equal likely outcome
Rolling Die
1/n ..n=#of outcomes

Subjective..
Based on opinion

Complement of an Event
The Complement of event A is defined to be the event consisting of all points that are not in A

Union of Two Events
The union of events A and B is the event containing all sample points that are in A or B or both
Usually a high probability

Intersection of Two Events
The intersection of events A and B is the set of all sample points that in both A AND B

Addition Law
P(A U B) = P(A) + P(B)  P(A n B)

Collectively Exhaustive
P(A) + P(B) = 1

A random variable
a NUMERICAL description of the outcome of an experiment
Discrete how many
Continuous how much

Catergorical data is always..?
Discrete

Quantitative data can be..?
Discrete or Continuous

Discrete Probability Distrubitions use..
Bar Charts
f(x)=1/n

Expected value is also the..
Mean

Success and Failure..
p= Success
1p= failure

Success is..
Success is what the question is asking for

Poisson Probability Distribution
Specified interval of time or space
Will say pertime or space
Make sure the units MATCH

A large Standard Deviation will cause..
to become larger and flatter