ECN 102 Study Guide - Midterm Guide: Stata, Summary Statistics, Null Hypothesis
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Total of 35 points and worth 22. 5% of course grade. Read question carefully so you answer the question. You are to use only simple calculations (+, -, /, *, square root) and show all workings. For computations (cid:12)nal answers should be to at least four signi(cid:12)cant digits. You may remove the formula sheet and the stata output sheet(s) at end of exam. 1. (a) suppose there are three observations on variable x, respectively, 2, 4 and 5. Explain your answer. generate y = x[_n-1] (b) a person invests ,000 at interest rate 4 per cent per annum. After how many years will the investment be worth ,000. Explain your answer. (c) summary statistics show that variable w has sample mean 52 and sample variance 4. Provide the formula for a transformation of variable w that has sample mean 0 and sample variance. 1. (d) average primary support for donald trump is 39. 1 percent.
