The following table provides hypothetical information on 10 TTSE companies. The table gives theinformation on the percentage of stocks and the change (in dollars per share) in each stock's price.StockAgostiniAngosturaGuardian HoldingsNational EnterpriseSagicorFirstcaribbeanGraceKennedyPrestige HoldingsReadymix(WI)Berger PaintsPercentage traded19.614.712.49.39.08.07.97.97.87.4Change ($)-0.43-1.100.85-0.11-0.42-1.16-0.04-0.11-0.02-0.57 (a) With percentage traded as an independent variable and the change in the stock's price as a dependentvariable, compute SSxx, SSyy and SSxy(b) Construct a scatter diagram for these data. Does the scatter diagram exhibit a negative co-relationshipbetween the percentage of stock traded and the change in the stock's price?(c) Find the regression equation ŷ = a + bx(d) Give a brief interpretation of the values a and b calculated in part c.(e) Compute the correlation coefficient, r.(f) Predict the change in a stock's price if 8.6% of the stock's shares are traded on a day. Using part b,how reliable do you think this prediction will be?

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Suppose the Dow Jones Industrial Average went up 149.82 points. The following table shows the stock price changes for a sample of 12 companies on that day. PRICE CHANGE PRICE CHANGE COMPANY $ COMPANY $ AFLAC 0.81 JOHN&JOHN 1.46 BANK AMERICA 0.05 LOEWS CP 0.92 CABELVISION 0.41 NOKIA 0.21 DIAGEO 1.32 SMPRAENGY 0.97 FLOUR CP 2.37 SUNOCO 0.52 GOODRICH 0.4 TYSON FOOD 0.22 Provide 95% confidence interval estimates of the populatioin vairance and the population standard deviation.
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