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19 Cards in this Set
 Front
 Back
Parameter
definition 
Numerical description of a POPULATION


Statistics
definition 
Numerical description of a SAMPLE


Representative sample
definition 
mirrors population from which it was drawn


EPSEM
Equal probability of selcetion methods 
Each member of the population has an equal probability of being selected


Probability
definition 
Mathematical likelihood that an event will occur


To determine tthe probability of Event A OR Event B you need to...

add (+)the probability fractions together


To determine tthe probability of Event A AND Event B you need to...

multiply (*)the probabilty fractions


Odds
definition 
Changes against an event occuring


Odds is ddetermined by...

Subtracting the numerator in the probability fraction from the denominator
(1/4)...41=3...3 chances in 4 of not selecting a client 

Sampling distribution
definition 
Theoretical frequency distribution of a sample statistic


Central Limit Theorem
definition 
The sampling distribution of themeans becomes more normal with the increase in the sample size


Unibased Estimator
definition 
Statistic that doesn't underestimate or overestimate its corresponding parameter


Consistent Estimator
definition 
Statistic that tends to get close to the value of the parameter as the sample size increases


Efficient Estimator
definition 
Statistic with a small standard error


Interval Estimation
definition 
Delineate a range of values wherein the targeted population parameter is expected to fall


Confidence Interval
definition 
A range of scores around a point estimate that says how much you are willing to risk that the parameter is in the interval


Alpha
definition 
The risk factor
The probability of error 

Most common alpha is...

.05


tdistributions
definition 
bellshaped, symmetrical with a mean of 0
