A variety of procedures. Initial respondents are selected by probability methods. Additional respondents are obtained from information provided by the initial respondents.
5. Purposive sample
Subjects selected on the basis of specific characteristics or qualities. Users of a particular technology. Such as
Young mothers with small children, doctors, members of a fan club, target market members.
Probability Techniques:
Probability sampling techniques vary in terms of sampling efficiency. Sampling efficiency is a concept that reflects a trade-offs between sampling cost and precision. Precision refers to the level of uncertainty about the characteristic being measured. The greater the precision, the greater the cost and most studies require trade-off.
5. Purposive sample
Subjects selected on the basis of specific characteristics or qualities. Users of a particular technology. Such as
Young mothers with small children, doctors, members of a fan club, target market members.
Probability Techniques:
Probability sampling techniques vary in terms of sampling efficiency. Sampling efficiency is a concept that reflects a trade-offs between sampling cost and precision. Precision refers to the level of uncertainty about the characteristic being measured. The greater the precision, the greater the cost and most studies require trade-off.