One of the tightest Senatorial races on Tuesday is in Maine. In a race that could prove pivotal for control of the Senate, Senator Susan Collins faces a tough challenge for reelection from Sara Gideon who is the current Speaker of the Maine House of Representatives.   You receive new results today from a recent poll. The sample size was 1365 likely voters. 696 responded they are likely to vote for Gideon while the remaining 669 responded with Collins.    Calculate the sample proportion for each candidate.    What is the 95% margin of error for this poll?

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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.