problem 1: Distinguish carefully between stratified sampling, cluster sampling and quota sampling, stating the advantages and drawbacks of each method.

problem 2: A country is divided into regions and in each region there are both urban and rural areas. A survey is to be undertaken in which adults are to be interviewed.

problem 3: Devise a sampling scheme that is a combination of stratified, cluster and quota sampling.

problem 4: A village has 506 inhabitants, listed by name and address in a register. Describe in detail how to take a systematic sample of about 50 inhabitants from this list. State the advantages and drawbacks of this method.

problem 5: One thousand people were chosen to participate in a face-to-face survey. Of the thousand, 725 were at home at the first attempt to contact them however 52 of these refused to take part. One call-back was made to each person missed at the first attempt, and 30 of these people were not at home at the time of call. Of those that were at home, 49 refused to take part in the survey. Compute the response rate at the first contact, the response rate at the second contact and the total response rate.