Is the career someone chooses associated with being left- or right-handed? In one study a sample of Americans from a variety of professions were asked if they consider themselves left-handed, right-handed, or ambidextrous (equally skilled with the left and right hand). The results for five professions are shown in Table 7.30.

(a) In this sample, what profession had the greatest proportion of left-handed people? What profession had the greatest proportion of right-handed people?
(b) Test for an association between handedness and career for these five professions. State the null and alternative hypotheses, calculate the test statistic, and find the p-value.
(c) What do you conclude at the 5% significance level? What do you conclude at the 1% significance level?

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Right Left Ambidextrous Total Psychiatrist Architect 10 118 148 132 101 26 115 121 5 Orthopedic surgeon 6 6. Lawyer Dentist Total 83 16 105 132 635 116 536 10 32 67