The Wall Street Journal conducted a stock-picking contest in February 2000. In this experiment, three different methods were used to select stocks that were expected to perform well during the next five months. Four Wall Street professionals, considered experts on picking stocks, selected four stocks. Four randomly chosen readers of the Wall Street Journal also selected four stocks. Finally, four stocks were selected by flinging darts at a table containing a list of stocks. The returns of the selected stocks for February 9, 2000, to July 31, 2000 (in percentage return), are given in the following table. Note that during this period the Dow Jones Industrial Average gained 2.4 % (Georgette Jasen, “In Picking Stocks, dartboard beats the pros,” Wall Street Journal, September 27, 20001, C1, C10). Experts Readers Darts 39.5 -31 39 -1.1 -20.7 31.9 -4.5 -45 14.1 -8 -73.3 5.4 What is the computed value of the test statistic for testing that there is no significant difference in the average percentage returns for the three categories (Use α = 0.05)? Multiple Choice 10.9937 20.6000 2.1594 4.2565 20.4503
The Wall Street Journal conducted a stock-picking contest in February 2000. In this experiment, three different methods were used to select stocks that were expected to perform well during the next five months. Four Wall Street professionals, considered experts on picking stocks, selected four stocks. Four randomly chosen readers of the Wall Street Journal also selected four stocks. Finally, four stocks were selected by flinging darts at a table containing a list of stocks. The returns of the selected stocks for February 9, 2000, to July 31, 2000 (in percentage return), are given in the following table. Note that during this period the Dow Jones Industrial Average gained 2.4 % (Georgette Jasen, “In Picking Stocks, dartboard beats the pros,” Wall Street Journal, September 27, 20001, C1, C10). Experts Readers Darts 39.5 -31 39 -1.1 -20.7 31.9 -4.5 -45 14.1 -8 -73.3 5.4 What is the computed value of the test statistic for testing that there is no significant difference in the average percentage returns for the three categories (Use α = 0.05)? Multiple Choice 10.9937 20.6000 2.1594 4.2565 20.4503
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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The Wall Street Journal conducted a stock-picking contest in February 2000. In this experiment, three different methods were used to select stocks that were expected to perform well during the next five months. Four Wall Street professionals, considered experts on picking stocks, selected four stocks. Four randomly chosen readers of the Wall Street Journal also selected four stocks. Finally, four stocks were selected by flinging darts at a table containing a list of stocks. The returns of the selected stocks for February 9, 2000, to July 31, 2000 (in percentage return), are given in the following table. Note that during this period the Dow Jones Industrial Average gained 2.4 % (Georgette Jasen, “In Picking Stocks, dartboard beats the pros,” Wall Street Journal, September 27, 20001, C1, C10).
Experts
Readers
Darts
39.5
-31
39
-1.1
-20.7
31.9
-4.5
-45
14.1
-8
-73.3
5.4
What is the computed value of the test statistic for testing that there is no significant difference in the average percentage returns for the three categories (Use α = 0.05)?
Multiple Choice
10.9937
20.6000
2.1594
4.2565
20.4503
Transcribed Image Text:The Wall Street Journal conducted a stock-picking contest in February 2000. In this experiment, three different methods were used to select
stocks that were expected to perform well during the next five months, Four Wall Street professionals, considered experts on picking stocks,
selected four stocks. Four randomly chosen readers of the Wall Street Journal also selected four stocks. Finally, four stocks were selected by
flinging darts at a table containing a list of stocks. The returns of the selected stocks for February 9, 2000, to July 31, 2000 (in percentage
return), are given in the following table. Note that during this period the Dow Jones Industrial Average gained 2.4 % (Georgette Jasen, "In
Picking Stocks, dartboard beats the pros," Wall Street Journal, September 27, 20001, C1, C10).
Experts
39.5
Darts
39
31.9
Readers
31
11
-4.5
8
20.7
45
73.3
14.1
5.4
Compute the test statistic for whether the variation in returns is homogenous (equal variance) across the three categories. (Use a = 0.05.)
Multiple Cholce
10.9937
4.2565
20.4503
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