The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing price for the DJIA and the S&P 500 for 15 weeks, beginning with January 6, 2012, follow (Barron’s website, April 17, 2012). must be solved on excel Date DJIA S&P January 6 12360 1278 January 13 12422 1289 January 20 12720 1315 January 27 12660 1316 February 3 12862 1345 February 10 12801 1343 February 17 12950 1362 February 24 12983 1366 March 2 12978 1370 March 9 12922 1371 March 16 13233 1404 March 23 13081 1397 March 30 13212 1408 April 5 13060 1398 April 13 12850 1370   d. Did the estimated regression equation provide a good fit? Explain. e. Suppose that the closing price for the DJIA is 13,500. Predict the closing price for the S&P 500. f. Should we be concerned that the DJIA value of 13,500 used to predict the S&P 500 value in part(e) is beyond the range of the data used to develop the estimated regression equation?

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2. The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing price for the DJIA and the S&P 500 for 15 weeks, beginning with January 6, 2012, follow (Barron’s website, April 17, 2012).

must be solved on excel

Date

DJIA

S&P

January 6

12360

1278

January 13

12422

1289

January 20

12720

1315

January 27

12660

1316

February 3

12862

1345

February 10

12801

1343

February 17

12950

1362

February 24

12983

1366

March 2

12978

1370

March 9

12922

1371

March 16

13233

1404

March 23

13081

1397

March 30

13212

1408

April 5

13060

1398

April 13

12850

1370

 

d. Did the estimated regression equation provide a good fit? Explain.

e. Suppose that the closing price for the DJIA is 13,500. Predict the closing price for the S&P 500.

f. Should we be concerned that the DJIA value of 13,500 used to predict the S&P 500 value in part(e) is beyond the range of the data used to develop the estimated regression equation?

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