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### 19 Cards in this Set

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• 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)...4-1=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 t-distributions -definition- bell-shaped, symmetrical with a mean of 0