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

Chosen at random, 640 customers at an appliance shop are contacted and asked their opinions of the service they received

1)What type of sampling is used?PICK ONE

A)Systematic sampling is used, since customers are selected at fixed intervals

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

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

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

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

What potential sources of bias are present, if any? Select all that apply.

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

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

C)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.

D)There are no potential sources of bias.