# Sampling 4 C 7 Flashcards Charlotte Small
question

– The process of selecting observations.

Sampling
question

\”President\” Alf Landon

Two million ballots mailed to people listed in telephone directory Participants selected by phone directory and auto registration
question

Any technique in which samples are selected in some way not suggested by probability theory.

Nonprobability Sampling
question

Available subjects Purposive sampling Snowball sampling Quota sampling

Nonprobability Sampling
question

Convenience sampling Does not allow for control over representativeness.

Reliance on Available Subjects
question

A nonprobability sampling method whereby each person interviewed may be asked to suggest additional people for interviewing. Often used in field research, special populations

Snowball Sampling
question

A type of nonprobability sampling in which units are selected into a sample on the basis of pre-specified characteristics, so that the total sample will have the same distribution of characteristics assumed to exist in the population being studied.

Quota Sampling
question

Someone who is well versed in the social phenomenon that you wish to study and who is willing to tell you what s/he knows about it.

Informant
question

The general term for samples selected in accord with probability theory. Often used for large-scale surveys.

Probability Sampling
question

The quality of a sample of having the same distribution of characteristics as the population from which it was selected.

Representativeness
question

Samples need not be representative in all respects

only those relevant to the research.
question

EPSEM

Equal Probability of Selection Method)
question

Probability samples are typically more representative than other types of samples because

biases are avoided.
question

Probability theory permits researchers to estimate

the accuracy or representativeness of the sample.
question

That unit of which a population is composed and which is selected in a sample. Example: Survey’s- People or Types of People

element
question

The theoretically specified aggregation of the elements in a study. Examples: UCR Student Body, Residents of Riverside County

population
question

– A sampling method in which each element has an equal chance of selection independent of any other event in the selection process.

Study Population/Sample
question

– Each element has an equal change of selection independent of any other event in the selection process.

Random Selection
question

That element of set of elements considered for selection in some stage of sampling

sampling unit
question

A summary description of a given variable in a population.

parameter
question

the summary description of a variable in a sample, used to estimate a population parameter.

statistic
question

The degree of error to be expected of a given sample design.

Sampling Error
question

The estimated probability that a population parameter lies within a given confidence interval.

Confidence Level
question

The range of values within which a population parameter is estimated to lie.

Confidence Interval
question

– A list of units composing a population from which a sample is selected.

sampling frame
question

If the sample is to be representative of the population, it is essential that the sampling frame include

all members of the population.
question

A type of probability sampling in which the units composing a population are assigned numbers. A set of random numbers is generated and the units having those numbers are included in the sample.

Simple Random Sampling
question

A type of probability sampling in which every kth unit in a list is selected for inclusion in the sample.

Systematic Sampling
question

– The standard distance between elements selected from a population in the sample.

Sampling Interval
question

the proportion of elements in the population that are selected to be in a sample

Sampling Ratio
question

The grouping of the units composing a population into homogenous groups (strata) before sampling

Stratification
question

A multistage sampling in which natural groups are sampled initially with the members of each selected group being sub-sampled afterward. Church Membership

cluster sampling
question

Assigning different weights to cases that were selected into a sample with different probabilities of selection

Weighting
question

One of the most visible uses of survey sampling lies in _____.

political polling
question

. _____ sampling occurs when units are selected on the basis of pre-specified characteristics.

Quota
question

_____ describes a sample whose aggregate characteristics closely approximate the aggregate characteristics of the population.

Representativeness
question

A _____ is the list of elements from which a probability sample is selected.

sampling frame
question

_____ is the general term for samples selected in accord with probability theory.

Probability sampling
question

A _____ population is that aggregation of elements from which a sample if actually selected.