Probability Sampling

Question 1

Probability sampling

Answer 1

Sampling occurs by random process

Random process is a procedure produces one outcome from set of possible outcomes.

Question 2

Qualities of outcomes

Answer 2

Outcome must be unpredictable

Each of the possible outcome must be equally like to occur.

Question 3

Types of probability sampling

Answer 3

Simple random sampling
Stratified random sampling
Probability random sampling

Question 4

Simple random sampling

Answer 4

Each individual equal chance
Equality no individual is likely to be chosen then other
Selection independent of others

Question 5

Goal of simple random sampling

Answer 5

Selection procedure cannot discriminate among individuals

Result in non-representative sample

Question 6

Two methods of simple random sampling

Answer 6

Spring without replacement

Sampling with replacement

Question 7

Process of simple random sampling

Answer 7

Clearly define population from which
Make list
Use random process to select individual from list

Question 8

Systematic sampling

Answer 8

Dividing sample size with whole number of population

Question 9

Stratified random sampling

Answer 9

Consists of variety of group
Strata
Men,women

Question 10

Oversampling in stratified random sampling

Answer 10

Researcher draw sample including large proportion of strata then they are actually present in population.

Question 11

Cluster sampling

Answer 11

Individuals under study are already clustered in pre-existing group.
Researcher randomly select group.

Question 12

Combine strategy sampling

Question 13

No probability sampling types

Answer 13

Convenience sampling
Quota sampling
Snowball sampling
Purposive sampling

Question 14

Convenience sampling

Answer 14

Those individuals who h are easy to get.

Question 15

Snowball sampling

Answer 15

One or two individual from population are selected and these individual leads the researcher to other population members.

Question 16

Purposive sampling

Question 17

Quota sampling