In a survey, editors of a magazine asked 200 people whether or not they smoke and whether or not they exercise regularly (more than twice a week). The results are summarized in the table below. Smoke Do not smoke Exercise regularly 12 34 Do not exercise 36 118 regularly (a) What percentage of the adults smoke? (b) What percentage of the adults exercise regularly?

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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.