Does the male stock market investor earn significantly more than the female stock market investor? One study by the New York Stock Exchange showed that the male investor has an income of $46,400 and that the female investor has an income of $39,400. Suppose an analyst wanted to prove that the male investor earns more than the female investor. Suppose the following data represent random samples of male and female investors from across Canada. The analyst uses the Mann-Whitney U test to determine whether the male investor earns significantly more than the female investor for α = 0.01. What does the analyst find?

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Male $50,100 47,800 45,000 51,500 55,000 53,850 51,500 63,900 57,800 61,100 51,000 Female $41,200 36,600 44,500 47,800 42,500 47,500 40,500 28,900 48,000 42,300 40,000 31,400