# Shared Flashcard Set

## Details

Discrete-Stat
Vocab for Stat
37
Mathematics
11/01/2011

Term
 Data
Definition
 Any type of information packaged in numerical form
Term
 Population
Definition
 Collection of individuals or objectsPopulation isn't who they ask, but who they intend to apply it to
Term
 N-value
Definition
 ho many individuals are there in that population
Term
 Census
Definition
 The process of collecting date by going through every member of the population
Term
 Sampling Proportion (ratio)
Definition
 Sample size divided by population(n/N)Size of sample: nPopulation: N
Term
 Survey or a Poll
Definition
 Practical alternative of a census when you collect data from not all the member
Term
 Poll
Definition
Term
 Survey
Definition
 Broad. Want to weigh teens? Actually weigh them
Term
 Sampling
Definition
 Selecting a sample
Term
 Sample
Definition
 subgroup chosen to collect data
Term
 Target Population
Definition
 Distinguish the population for which the survey appliesWho you want to ask
Term
 Sampling Frame
Definition
 Actual subset of the population from which the sample will be drawnWho you actually ask
Term
 Response rate
Definition
 Percentage of respondents out of the total sample
Term
 Nonresponse Bias
Definition
 When people don't respond
Term
 Convenience Sampling
Definition
 Sample is what is easiest for the data collector
Term
 Quota Sampling
Definition
 Systematic effort to force the sample to be representative of a given population through the use of quota
Term
 Random Sampling
Definition
 Sampling methods that use randomness as part of their decision
Term
 Simple Random Sampling
Definition
 Most basic form of random samplingProblem isn't picking, it's getting everybody in there to start with
Term
 Stratified Sampling
Definition
 Break the sampling bream into categories called strataUnlike quota sampling, a sample from the strata is chosen randomly
Term
 Statistic
Definition
 Describe any kind of numerical information drawn from a sample
Term
 Parameter
Definition
 Statistic is always an estimate for some unknown measure of the population. Parameter is only achievable to be exact through a census
Term
 Sampling Error
Definition
 The difference between a parameter and a statistic used to estimate that parameterP-S=(+/-)X
Term
 Chance Error
Definition
 Results of the basic fact that a sample, being just a sample, can only give us approximate information about the population
Term
 Sample Variability
Definition
 Different samples are likely to produce different statistics for the same population, even then samples are chosen in exactly the same way
Term
 Sample Bias
Definition
 Results of choosing a bad sample and is much more serious problem than chance error
Term
 Margin of Error
Definition
 Less than 5%
Term
 Capture-Recapture
Definition
 (tagged/N[population])=(tagged/n[sample])
Term
 Confounding Variable
Definition
 All other possible contributing causes
Term
 Controlled Study
Definition
 The subjects are divided into two groups. The treatment group and the control group
Term
 Treatment Group
Definition
 Consists of those subjects that are receiving the actual treatment
Term
 Control Group
Definition
 Consists of those subjects that are not receiving any treatmentComparison Group
Term
 Randomized Control Study
Definition
 The subjects are assigned to the treatment group of the control group randomly (typically by a computer program)
Term
 Placebo Effect
Definition
 Just the idea that one is getting a treatment can produce positive results
Term
 Placebo
Definition
 Make-believe form of treatment
Term
 Controlled Placebo Study
Definition
 A controlled study in which the subjects in the control group are given a placebo
Term
 Blind
Definition
 A study in which neither the members of the treatment group not the members of the control group know which of the two groups they belong to
Term
 Double Blind Study
Definition
 A controlled placebo study in which neither the subjects nor the scientists conducting the experiment know which subjects are in the treatment group and which are in the control group
Supporting users have an ad free experience!