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In a poll of 4 7 2 human resources directors, 6 3 % expressed the belief that they would be hiring new staff in the

In a poll of 472 human resources directors, 63% expressed the belief that they would be hiring new staff in the next three months. What is the 98% confidence interval for the proportion of all personnel directors intending to hire personnel over the next three months?
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0.63\pm 0.057
0.63\pm 0.047
0.63\pm 0.052
0.63\pm 0.042

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