An accountant looks at the portfolios of 30 random clients to see their primary investment tools.  The results are given below: inv. tool        freq. stocks 10 bonds  8 currency           6 commodities  4 options  2   If the accountant wanted to test whether or not each type of investment tool was equally popular among these clients, what.is the appropriate test statistic for doing this test?     a. χ2 = 40 on 4 df      b. χ2 = 40 on 30 df      c. χ2 = 40/6 on 30 df      d. χ2 = 40/6 on 4 df      e. χ2 = 40 on 5 df      f. χ2 = 40/6 on 5 df

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