Research methods(sampling)

Question 1

Opportunity sampling -

Answer 1

Recruit those people who are most convenient or available, for example people who are close walking by you.

Question 2

Opportunity sampling - strengths

Answer 2

Easiest method as you use the first suitable participants you can find, meaning it takes less time to make your sample.

Question 3

Opportunity sampling - (limitations)

Answer 3

The sample is only drawn from those of a few sew selected from people possibly in the area or at the given time meaning it may not offer much population validity.

Question 4

Random sampling -

Answer 4

The items available all have an equal chance of being selected, there are a number of various techniques being available, for example the lottery method.

Question 5

Random sampling -(strengths)

Answer 5

Removes bias as all the members have the same equal chance of being picked and cannot be influenced by researchers.

Question 6

Random sampling - (limitations)

Answer 6

Need a list of all members of the population and then contact those who are needed, this may take some time.

Question 7

Stratified sampling -

Answer 7

Subgroups within a population are identified. Participants are obtained from each of the strata in proportion to their occurrence in the population, the selection of strata is done using a random technique.

Question 8

Stratified sampling - (strengths)

Answer 8

Seen as more representative, from many different sampling sites being presented.

Question 9

Stratified sampling - (limitation)

Answer 9

Very time consuming to identify subgroups, then randomly select participants and contact them.

Question 10

Systematic sampling -