The quality manager for a major automobile manufacturer is interested in estimating the mean number of paint defects in cars produced by the company. She wishes to have her estimate be within ± 0.10 of the true mean and wants 98% confidence in the estimate. The file called CarPaint contains data from a pilot sample that was conducted for the purpose of determining a value to use for the population standard deviation. How many additional cars need to be sampled to provide the estimate required by the quality manager?