Statistics

14 cards·by kellikinz123

simple random sampling

consists of individuals from the population chosen in such a way that every individual has an equal chance to be part of the actual sample

table of random digits

a long string of the digits from 0-9 which each entry is equally likely to be any of the digits and the entries are individual of each other

prbability sampling

a sample chosen by chance (must know what samples are possible and what chance each possible sample has)

stratified random sampling

divide population into groups of similar individuals choose separate SRS in each stratum and combine these SRS to from a full sample

strata

groups of similar individuals

observational study

observes indiviuals and measures variables of interest but does not attempt to influence the responses

experiment

a deliberately imposed treatment of individuals in order to observe responses

population

the entire group of individuals that we want information about

sample

part of the population that we examine to gather information

sampling

study involving a part in order to gain information about the whole

census

contacting every individual in an entire population

voluntary response sample

people who choose themselves as responding (biased) strongly negative opinionated

convenience sampling

choosing individuals that are easiest to reach

biased

systematically favoring a certain outcome