Figure 1.19 8. Prove that the twisted cubic (given in Example 3) has the property that any three distinct points on it determine a plane; i.e., no three distinct points are colline ar. 9. Sketch families of level curves and the graphs of the following functions f. x (a) f = 1 - (c) f = x2 - y2 У y X (b) f : x2 - y (d) f = xy y 10. Consider the surfaces X = :x+y2-1 and Y = xy2-z2-1 y y Z

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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.