Search
Create
Log in
Sign up
Log in
Sign up
AP Stat
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (22)
population
entire group of individuals or instances about whom we hope to learn (parameter)
sample
(statistic) a representative subset of a population. Hope to learn about the population
sample survery
study that asks questions of a sample drawn from some population in hopes of learning about the entire population. Example: polls
bias
a failure of a sampling method. over or underestimate parameters. Almost impossible to recover from bias.
randomization
each individual is given a fair, random chance of selection. best defense against bias
sample size
number of individuals in the sample
census
sample that consists of the entire population
population parameter
numerically valued attribute of a model for a population. Estimated from sampled data.
statistic, sample statistic
values calculated for sampled data. Estimate the population parameter
representative
if the statistics computed from the sample accurately reflects the corresponding population parameters
simple random sample
each set of n elements in the population has an equal chance of selection
sampling frame
list of individuals from whom the sample is drawn. Included in sample
stratified random sample
population is divided into several subpopulations (strata) and random samples are drawn from each stratum. homogeneous
cluster sample
sampling design in which entire groups (clusters) are chosen at random. Usually selected as a matter of convenience/practicality/cost. heterogeneous.
multistage sample
sampling schemes that combine several sampling methods.
systematic sampling
selecting individuals systematically from a sampling frame.
pilot study
small trial run of survey. check if questions are clear. reduce errors due to ambiguous questions.
voluntary response bias
bias introduced to a sample when individuals can choose whether or not to participate in the sample. always invalid. cannot be recovered.
convenience sample
individuals who are conveniently available. fail to be representative because not every individual is equally convenient.
undercoverage
gives part of the population less representation.
nonresponse bias
large fraction of those sampled fails to respond. those who respond do not represent the entire population. voluntary response.
response bias
anything in a survey design that influences responses. the wording of questions.
YOU MIGHT ALSO LIKE...
Essentials of Business Research | Silver, Stevens, Kernek, Wrenn, Loudon
AcademicMediaPremium
$9.99
STUDY GUIDE
AP Statistics: Modeling the New World Chapter 11
23 Terms
Music_luva
AP Stats Ch 12
19 Terms
shawheen
Chapter 3
26 Terms
chelseibrown12
OTHER SETS BY THIS CREATOR
A ver si recuerdas
32 Terms
NikkiGosselin
Vocabulary
25 Terms
NikkiGosselin
SPANISH VOCAB
33 Terms
NikkiGosselin
A ver si recuerdas
78 Terms
NikkiGosselin
THIS SET IS OFTEN IN FOLDERS WITH...
APStats: Chapter 5: Producing Data
42 Terms
Rebekka_Eva
APStats: Chapter 6: Probability
15 Terms
Rebekka_Eva
APStats: Chapter 7: Random Variables
17 Terms
Rebekka_Eva
AP Statistics Exam Review
114 Terms
jackl250
;