Imagine that you have arrived in Malate, Manila to conduct a case study o working street children. A local social worker introduces you to two form street working children and you learn that they still have lots of friends s working on the street. As a way to identify participants for your study, you as the two former street working children if they can recommend and invite som of their friends on the street to participate in the study. You also ask them spread word of the study in anticipation that their friends will also help you identify potential participants. How would you classify this kind of sampling? 1. Quota sampling? 2. Snowball sampling? 3. Random purposeful sampling? Explain your answer.

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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.