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The following table shows the female physicians in the United States cross classified by age and specialty. Under 35 35-45 45 or over Total Family

The following table shows the female physicians in the United States cross classified by age and specialty.

Under 35 35-45 45 or over Total
Family Practice 5842 6797 2828 15467
Internal Medicine 11799 12838 5864 30501
Obstetrics/Gynec. 4454 4857 2202 11513
Plastic Surgery 85 262 131 478
Total 22180 24754 11025 57959

Suppose a female physician is chosen randomly.

Are age and specialty independent?

Yes or no?

Are age and specialty disjoint?

Yes or no?

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