Sampling

Question 1

means of gathering useful information about a population

Answer 1

Sampling

Question 2

a list, map, directory, or other sources used to represent the population

Answer 2

Frame

Question 3

every unit of the population has the same probability of being selected into the sample

Answer 3

Random sampling

Question 4

not every unit of the population has the same probability of being selected in the sample

Answer 4

Nonrandom sampling

Question 5

4 random sampling techniques

Answer 5

1. Simple Random Sampling
2. Stratified Random Sampling
3. Systematic Random Sampling
4. Cluster (or Area) Random Sampling

Question 6

• basis of other random sampling methods

- a table of random numbers generator (usually computer program) is used to select n items into the sample

Answer 6

Simple random sampling

Question 7

population is divided into nonoverlapping subpopulations called strata

Answer 7

Stratified random sampling

Question 8

occurs when percentage of the sample taken from each stratum is proportionate to the percentage that each stratum is within the whole population

Answer 8

Proportionate

Question 9

ccurs whenever the proportions of the strata in the sample are different from the proportions of the strata in the population

Answer 9

Disproportionate

Question 10

used not to reduce sampling error but because of its convenience and relative ease of administration

Answer 10

Systematic random sampling

Question 11

involves dividing the population into nonoverlapping areas (clusters)•…but clusters tend to be internally heterogenous

Answer 11

Cluster random sampling

Question 12

4 nonrandom sampling techniques

Answer 12

1. Convenience Sampling
2. Judgement Sampling
3. Quota Sampling
4. Snowball Sampling

Question 13

elements for the sample selected for the convenience of the researcher, e.g., elements that are readily available, nearby, or willing to participate

Answer 13

convenience sampling

Question 14

• occurs when elements selected for the sample are chosen by the judgement of the researcher
• prone to biases

Answer 14

judgement sampling

Question 15

• similar to stratified random sampling by using population subclasses such as group, gender, or geographic region
• gather data from one stratum until the desired quota of samples is filled

Answer 15

quota sampling

Question 16

survey subjects are selected based on referral from other survey respondents

Answer 16

snowball sampling

Question 17

occurs when the sample is not representative of the population

Answer 17

sampling errors

Question 18

all errors other than sampling

•missing data, recording errors, input processing errors, and analysis errors

Answer 18

nonsampling errors