ECN 102 Study Guide - Midterm Guide: Variance, Stata, Statistical Hypothesis Testing
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Total of 30 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 a random sample of size 100 on variable x yields a sample mean of 50 and a sample standard deviation of 400. Question 2 uses stata output given at the end of this exam. For some questions the answer is given directly in the output. For other questions you will need to use the output plus additional computation. The data are for state (cid:13)agship universities in 2014. Instate = 2014-15 in-state tuition and fees in dollars. Outofstate = 2014-15 out-of-state tuition and fees in dollars.
