Three dentists wanted to compare the ages of their patients. They each calculated their patients’ mean age and the mean absolute deviation of their ages. They displayed the results in a table. Which statements are true? Choose exactly two answers that are correct.

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Three dentists wanted to compare the ages of their patients. They each calculated their patients’ mean age and the mean absolute deviation of their ages. They displayed the results in a table. Which statements are true? Choose exactly two answers that are correct.

Mathematics
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Dentist Mean patient age MAD Appiah 43 9.7 Cantwell 29 13.9 Singh 41 14.1 A. Dr. Appiah’s patients’ ages vary more than do Dr. Cantwell’s patients’ ages. B. Dr. Appiah’s patients’ ages vary less than do Dr. Singh’s patients’ ages. C. Dr. Cantwell’s patients’ ages and Dr. Singh’s patients’ ages vary about the same amount. D. Dr. Singh’s patients’ ages and Dr. Appiah’s patients’ ages vary about the same amount.
I would go with B and C
@zoomiemoo in open study we can not give direct answer we help them understand there question

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Other answers:

the standard deviation increases as the range gets larger

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