Identify the sampling techniquesused, and discuss potential sources of bias(if any). Explain.

Chosen atrandom, 640 an electronics store electronicsstore are contacted and asked their opinions of the service they received.

What type of sampling isused?

A.

Systematic sampling isused, since customers are selected at fixed intervals.

B.

Cluster sampling isused, since the population of customers is divided into groups and several groups are selected and all of their members sampled.

C.

Convenience sampling isused, since the business is selecting from its customers that are easiest to reach.

D.

Simple random sampling isused, since the business is selecting from its customers atrandom, and all samples of 640 customers have an equal chance of being selected.

E.

Stratified sampling isused, since the population of customers is divided into groups and a random sample is selected from each group.

2) What potential sources of bias arepresent, ifany? Select all that apply.

A.

If there is a regular pattern to thecustomers, it is possible for the sample to not be representative.

B.

The wording of the question asked to the customers may influence them towards a particular response. The results would not be usable in this case.

C.

The sample consists only of customers that are easy to reach. This sample may not be representative of the population.

D.

There are no potential sources of bias.