The document describes four different sampling situations and identifies the type of sampling used in each: 1) A random sample of telephone prefixes was selected and all households within those prefixes were surveyed, representing cluster sampling. 2) A sample of 30 patients from a single nursing home was used, representing convenience sampling. 3) Every 20th bottle of beer produced was tested, representing systematic sampling. 4) Subscribers were assigned numbers and 30 were randomly selected using a random number table, representing simple random sampling.

1. categorize the type of sampling (simple random,systematic, cluster, or convenience) used in each
of the following situations. ___________ to conduct a preelection opinion poll on a proposed
amendment to the state constitution, a random sample of 10 telephone prefixes (firest three digits
of the phone number) was selected, and all households from the phone prefixes selected were
called. ___________ to conduct a study on depression among the elderly, a sample of 30
patients in one nursing home was used ___________ to maintain quality control in a brewery,
even 20th bottle of beer coming off the production line was opened and tested ___________
Subscribers to the magazine sound alive were assigned numbers. then a sample of 30 subscribers
was selected by using a random number table. The subscribers in the sample were invited to rate
new compact disk.
Solution
Cluster samplingto conduct a preelection opinion poll on a proposed amendment to the state
constitution, a random sample of 10 telephone prefixes (firest three digits of the phone number)
was selected, and all households from the phone prefixes selected were called.
Convenience samplingto conduct a study on depression among the elderly, a sample of 30
patients in one nursing home was used.
Systematic samplingto maintain quality control in a brewery, even 20th bottle of beer coming off
the production line was opened and tested.
Simple random sampling:Subscribers to the magazine sound alive were assigned numbers. then a
sample of 30 subscribers was selected by using a random number table. The subscribers in the
sample were invited to rate new compact disk.