ECON 113 Midterm: Winter 04 Midterm 1
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The exam is closed book, closed notes and no calculators. 3/6: we are interested in the relationship between the number of hours an athlete has run on a typical week over the last year (x) and how fast they can run a mile in minutes (y). We pick a random sample of athletes and get the numbers below. 1b: compute (cid:108, please plot the data above and lay the regression line you just computed over it. 1b tell us about the relationship between training effort and performance on a one mile run: will increasing training time by 1 hour necessarily change an athlete"s mile time by (cid:108) Extra credit: you flip three coins that are loaded. The pr(heads) = . 6 and the random variable of interest x is the number of heads. 1 i x i x y i y. 1 i (cid:109) ob (cid:108) y b x.
