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Some financial theoreticians believe that the stock market's daily prices constitute a random walk with positive drift. If this is accurate, then the Dow Jones

Some financial theoreticians believe that the stock market's daily prices constitute a "random walk with positive drift." If this is accurate, then the Dow Jones Industrial Average should show a gain on more than 50% of all trading days. The average increased on 101 of 175 randomly chosen days. The test statistic for this problem is?

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