Gun rights vs. gun control: In a December 2014 report, “For the first time in more than two decades of Pew Research Center surveys, there is more support for gun rights than gun control.” According to a Pew Research survey, 52% of Americans say that protecting gun rights is more important than controlling gun ownership. Gun rights advocates in a conservative city believe that the percentage is higher among city residents. They survey 200 city residents and find that 130 say that protecting gun rights is more important than controlling gun ownership. What is the test statistic? http://www.people-press.org/2014/12/10/growing-public-support-for-gun-rights/  Z = -3.68  Z = 3.68  Z = -3.85  Z = 3.85

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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.