In order to test the effectiveness of the Flu vaccine, it was
administered to 600 people who were selected at random. At the end
of the Flu season it was determined that 504 individuals did not
get the Flu. Then the 95% confidence interval for the true
proportion p of individuals who develop immunity is given by0.84 ±
0.05
0.84 ± 0.029
0.84 ± 1.96
0.84 ± 0.196
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