Sonya collected data on the shoe size worn by each member of her class. She sees that John wears a size 9 shoe. What type of data are these? 1.primary aggregate data 2.secondary aggregate data 3.primary microdata 4.secondary microdata

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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.