Validating a questionnaire

There is no significant difference between the level of male and female satisfaction with the service.There is no significant relationship between managerial level and support of the new budget.

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For example, the null hypotheses for the two examples would be: There is no significant relationship between a customer's age and their level of satisfaction with the service.It is perhaps more important to ask questions that involve decision making criteria.Business research usually seeks to answer one or more testable research questions.Generally, validity is based solely on the judgment of the researcher.When an instrument is developed, each question is scrutinized and modified until the researcher is satisfied that it is an accurate measure of the desired construct, and that there is adequate coverage of each area to be investigated." Most statistics textbooks will tell you that the way to "debug" a questionnaire is to send the questionnaire to a sample of about 30 potential respondents and evaluate their responses for potential problems.

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