# qa defs

The flashcards below were created by user codyrayh on FreezingBlue Flashcards.

1. continuity correction factor
• 1. atleast X occurs = x-.5
• 2. more than X occurs= x+.5
• 3. x or fewer occurs= x+.5
• 4.fewer than x occurs=x-.5
2. simple random sample
a sample selected so that each item or person in the population has the same chance of being included
3. systematic random sample
a random starting point is selected, and then every kth member of the population is selected
4. stratified random sample
a population is divided into subcatagories, called strat, and a sample is randomly selected from each stratum
5. cluster sample
a population is dvided into clusters using naturally occuring geographic or other boundaries. then clusters are randomly selected and a sample is collected by randomly selecting from each cluster
6. sampling error
the diff between a sample statistic and its corresponding population parameter
7. sampling distribution of the sample mean
a probability distribution of all possible sample meant of a given size
8. central limit theorem
if all samples of a particular size are selected from any population, teh sampling distribution of the sample mean is approximately a normal distribution. this approximation improves with larger samples
9. point estimate
the statistic, computed from sample information which is used to estimate the population paremeter
10. confidence interval
a range of values constructed from a sample data so that the population parameter is likely to occur within that range at a specified probability. the specified probability is called the level of convidence
 Author: codyrayh ID: 17833 Card Set: qa defs Updated: 2010-05-05 02:25:27 Tags: quantitive analysis Folders: Description: definition Show Answers: