Flashcards in chapter 5 Deck (20):

1

## non probability sampling

###
subjects are selected in a way not suggested by probability theory

reliance on subjects

purpose/ judgement sampling

snowball sampling

quota sampling

2

## reliance sampling ??

###
no control over representativeness

only sometimes justifiable

3

## judgement sampling

###
the units to be observed are selected on the basis of the researchers judgement

subjects direct the sampling in certain directions

4

## snowball sampling

###
the person being interviewed can suggest other people to come in and be interviewed

uncovers the dynamic of natural and organic social network

5

## quota sampling

###
subjects are selected based on the basis of pre specified characteristics so that the next sample will have the same characteristics

field research

6

## informant

### someone who knows shit about something specific and is welling to share that knowledge with you

7

## probability sampling

###
samples selecting in accord with probability theory

large scale surveys

more representative because bias is avoided

permits researchers to estimate the accuracy of representativeness of the sample

8

## representativeness

###
a sample will be representative if all the members of the population have a chance at being in the sample

EPSEM

9

## element, population, study population

###
element; unit selected in a sample

population; specified aggregation of the elements in the study

sp; each element has an equal chance of selection (also random selection def)

10

## sampling unit

### elements considered for selection in a stage of sampling

11

## parameter

### summary discription of a given variable in a population

12

## sampling error

### the degree of error to be expected of a given sample design

13

## confidence level and confidence interval

###
CL; population parameter lies within a certain confidence interval

CI; the range of values in which a population parameter lies

both provide basis for determining the appropriate sample size for a study

14

## sampling frame

### a list of unit that make up the population from which the sample is made

15

## simple random sampling

###
each person is assigned the numbers and then random numbers/persons are included in the sample

not the most accurate sampling method

16

## systematic sampling

###
random sampling with a pattern,

every kth unit is chosen to participate

a bit more accurate than simple random sampling

sampling interval; distance between elements selected from a population in a sample

population size/ sample size

sampling ration; the proportion; sample size/population size

17

## stratified sampling ??

###
grouping of units into homogenous groups

stratification can take place at each stage of sampling

18

## cluster sampling

### theres mini samples under a bigger sample that have random units and are randomly chosen

19

## probability proportionate to size ??

### cluster sampling but the clusters aren't based on equal probability, but on probability according to size

20