In each of the following situations, a random sample must be obtained. Determine whether a cluster, stratified, or systematic random sampling would be appropriate. Explain in brief detail how the sampling is to be conducted. Do not discuss expected results or conclusions. a.    A large convenience store chain wishes to determine its customers’ level of satisfaction with regard to their service.   b.    A nationwide survey on charter change is to be conducted. (Note: there are seventeen regions in the Philippines.)   c.    An educational researcher wants to compare the difference in career goals between male and female students of Mary heights College having 10,000 students.

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.