PSYC 218 Study Guide - Midterm Guide: Central Limit Theorem, Convenience Sampling, Sampling Error
Document Summary
Inferential stats methods employ inductive reasoning (from particular to general) Most of stat techniques used in behavioural research developed based on assumption that infinite pop being sampled. An increase in sample size will not insure representativeness, sampling procedure should be altered. Appropriate sampling methods=which maximize the probability that: 1. Resulting sample will be adequately representative of pop: 2. Resulting sample stats will provide adequately precise estimates of pop parameters. Representative= its characteristics must adequately mirror those of parent pop: resolved through properties of randomness samples in long run are representative. Practical advantage of systematic samples is that they are often easier to obtain than random samples. Like x"s, the mean of means is equal to: 3. Sd of means is standard error of the mean . Sampling error pertaining to sample mean is (xbar ) difference. Eg. in the long run, 68% of ci formed in this way will accomplish their mission (include )
