With reference to the r × c table on page 371, use the method suggested in Exercise 14.73 to test at the 0.05 level of significance whether there is a relationship between I.Q. and on- the- job performance. Replace the row headings as well as the column headings by - 1, 0, and 1.
r × c table on page

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Performance Poor Fair Good waverage 67 64 25 156 42 76 56174 IQ Average Above averag10 2337 119 163 18 400