In a survey of 472 personnel directors, 63% thought that they would be hiring new personnel over the next three months. Which of the following represents a 98% confidence interval for the proportion of all personnel directors planning to hire personnel over the next three months?
A)	0.63 0.057
B)	0.63 0.047
C)	0.63 0.042
D)	0.63 0.052
Answer:D
In a survey of 472 personnel directors, 63% thought that they would be hiring new personnel over the next three months. Which of the following represents a 98% confidence interval for the proportion of all personnel directors planning to hire personnel over the next three months?
A)	0.63 0.057 B)	0.63 0.047 C)	0.63 0.042 D)	0.63 0.052