2. Let n E N and S = {0,1,2,...,2n – 1, 2n}. Suppose that f : S → S is a bijection. Prove that there is some even integer k E S such that f(k) is also even. (State clearly any results you use.)

Q: sin:

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A: Function f(x,y)  take maximum and minimum value at its critical points

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A: Recall the following fact.

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.