We Want to Estimate with 99 Percent Confidence the Percentage $\left[ \begin{array} { l l } .18 & .27\end{array} \right]$

Multiple Choice

We want to estimate with 99 percent confidence the percentage of buyers of cars who are under 30 years of age.A margin of error of 5 percentage points is desired.What sample size is needed? In an earlier sample,we found a 99 percent confidence interval of buyers under 30 years of age to be $\left[ \begin{array} { l l } .18 & .27\end{array} \right]$
)

A) 104
B) 664
C) 392
D) 523