The definition of 'Sample Selection Bias' is a type of bias caused by choosing non-random data for statistical analysis. The bias exists due to a flaw in the sample selection process, where a subset of the data is systematically excluded due to a particular attribute.
In statistics, a misleading graph, also known as a distorted graph, is a graph that misrepresents data, constituting a misuse of statistics and with the result that an incorrect conclusion may be derived from it
Disadvantages of a survey:
• Subject dependent
• May have validity Issues
• Errors due to non-response
• Limited by response choices
Not clearly defining the purpose of a survey is a common mistake. Before beginning a survey, it is strongly recommended that the following questions be answered:
1. What is the purpose of the survey?
2. Can the information be obtained by other means?
3. Can the intended audience be reached?
4.If a survey is needed, who will use the information and how will it be used?