A poll showed that 48 out of 120 randomly chosen graduates of California medical schools last year intended to specialize in family practice.What is the width of a 90 percent confidence interval for the proportion that plan to specialize in family practice?
A) ± 0.0447
B) ± 0.0736
C) ± 0.0876
D) ± 0.0894
Correct Answer:
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