STATS 401 Study Guide - Midterm Guide: Random Variable, Independent And Identically Distributed Random Variables, Null Hypothesis
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Solution: 7/9: the following population model relates a child"s height to his or her age and gender, including an interaction betweeen age and gender: Solution: p (x > 60) = p (z > (60 55. 27)/2) 0. 01. 1: the following expressions played a role in developing the sum of squares view of linear regression: C: yi y (xi x) (xi x) (a) (5pt) which one of the following statements is true: More than one may be true, or possibly none is true. P i(yi yi)( yi y ) > 0. Yi and yi have the same expected value. Solution: 1 and 2 are true, 3 is false: suppose we observe iid univariate data x1, . , x30 with mean 1 and standard deviation. Solution: p ( x > 1) = p (z > Solution: p ( x > 1. 5) = p (z > 30(1. 5 1)/2) = p (z > 1. 37) 0. 09.
