800 randomly selected automobile owners were asked the main reason why they had bought their current automobile. The results are given below. State null hypothesis and alternative hypothesis. Let alpha3D0.05, Calculate the Chi-Square test statistic. Give your conclusion for this test. (Using the chi-square table with df = 2,chi-square critical= 5.991) Engineering Fuel Economy 150 Total Styling 50 80 280 Male Female Total 120 200 520 800 150 250 200 400

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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.