Which of the following is an example of statistical inference?
A. Calculating the amount of fly spray needed for your orchard next season.
B. Counting the number of patients who file malpractice suits after being discharged from hospitals in New York State.
C. Calculating the mean age of patients discharged from hospitals in New York State in 1997.
D. Calculating the mean number of fruit trees damaged by Mediterranean fruit flies in California last year.
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