April 6 , 2011
Research Methods II
• A sample is part of a group.
• A population is the entire group.
• A voluntary response sample is a group of people who chose themselves in
response to a general appeal.
• A representative sample is a group is a group of people chosen so their
characteristics closely match those of the population of interest.
• A convenience sample consists of people who are easiest to reach.
• If respondents are chosen at random and an individual’s chance of being chosen
is known and greater than zero, the respondents constitute a probability sample.
• A sampling frame is a list of all the people in the population of interest.
• A randomizing method is a way of ensuring every person in the sampling frame
has a known, equal, and non-zero chance of being selected.
• A mail questionnaire is a form containing questions is mailed to the respondent
and returned to the researcher through the mail system.
• The response rate