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A polling organization interviewed by phone 400 randomly selected fans about their opinion on random drug testing of professional baseball players and found that 40%
A polling organization interviewed by phone 400 randomly selected fans about their opinion on random drug testing of professional baseball players and found that 40% favoured such a regulation. A) (2 marks) Construct a 99 % confidence interval for the true proportion, , of fans who favour this type of drug testing for baseball players. B) (1 mark) Did the majority of fans favour such a regulation? Draw a clear conclusion.
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