1 A survey of 117 consumers found that 81 had a tablet computer, 70 had a smartphone and 29 had both a smartphone and a tablet computer. a Find the number of consumers surveyed who had neither a smartphone nor a tablet. b Find the probability that when choosing one of the consumers surveyed at random, a consumer who only has a smartphone is chosen. c In a population of 10000 consumers, predict how many would have only a tablet computer.

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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.