MGEB12H3 Study Guide - Midterm Guide: Stol, Random Variable, Joule
6 May 2014
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Mgeb12 quantitative methods in economics ii - lecture 02. Chapter 9 - hypothesis testing of mean, population variance unknown: introduction. 1: t-distributed random variable t-distribution is symmetric just like normal distribution, degrees of freedom (d. f. ) is # of independent pieces of information that goes into computing the standard deviation s. Expected value = e[t] = 0 variance = 2: table in appendix b only provides a limited number of values, may need to use linear interpolation to find additional values. Given 2 points (x0,y0) and (x1,y1) to find value of y for x0 x x1: x y y. Given 2 points (x0,y0) and (x1,y1) to find value of x for y0 y y1: y x x. Suppose t is t-distribution with degrees freedom 59. P[ t 1. 841] = ? (ans=0. 0353) you type. 2p[t 1. 841] = ? (ans=. 070651) you type. If 2p[ t a ] = . 1, a = ? (ans=1. 67) you type.
