A Weight-Lifting Coach Claims That a Weight-Lifter Can Increase Strength

question 38

Essay

A weight-lifting coach claims that a weight-lifter can increase strength by taking vitamin E. To test the theory, the coach randomly selects 9 athletes and gives them a strength test using a bench press. Thirty days later, after regular training supplemented by vitamin E, they are given the same test again. The weights pressed (in pounds) before and after the vitamin E regimen are shown below. Use the Wilcoxon signed rank test to test the claim that the vitamin E supplement is effective in increasing the athletes' strength. Use ? = 0.05. $$\begin{array} { l c c c c c c c c c } \hline \text { Athlete } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\\hline \text { Before } & 221 & 273 & 216 & 259 & 238 & 227 & 213 & 244 & 239 \\\text { After } & 231 & 278 & 216 & 257 & 245 & 242 & 218 & 239 & 244\end{array}$$

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DAX-30 Index Futures

Futures contracts that speculate on the future value of the DAX, a stock index of 30 major German companies trading on the Frankfurt Stock Exchange.

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A term describing a security or other asset that is selling for a price considered to be below its intrinsic or true value.

Arbitrage Profit

The profit made from buying and selling identical assets in different markets or formats to take advantage of differing prices for the same asset.

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The action of acquiring ownership in a security or other financial asset in the hope of generating a gain.