Sampling Type Practice

Categorize the type of sampling used:

To conduct a pre-election opinion poll on a proposed amendment to the state constitution, a random sample of 10 telephone prefixes (first three digits of phone number) was selected, and all households from the phone prefixes selected were called.

• Random

• Systematic

• Convenience

• Stratified

• Cluster

Categorize the type of sampling used:

To conduct a study on depression among the elderly, a sample of 30 patients in one nursing home was used.

• Random

• Systematic

• Convenience

• Stratified

• Cluster

Categorize the type of sampling used:

To maintain quality control in a brewery, every 20^th bottle of beer coming off the production line was opened and tested.

• Random

• Systematic

• Convenience

• Stratified

• Cluster

Categorize the type of sampling used:

Subscribers to the magazine Sound Alive were assigned numbers. Then a sample of 30 subscribers was selected by sing a random-number table. The subscribers in the sample were invited to rate new compact disc players.

• Random

• Systematic

• Convenience

• Stratified

• Cluster

Categorize the type of sampling used:

To judge the appeal of a proposed tv sitcom, a random sample of 10 people from each of three different age categories was selected and those chosen were asked to rate a pilot show.

• Random

• Systematic

• Convenience

• Stratified

• Cluster