Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the lube and oil change for customers is 9.00 minutes. The manager wishes to estimate...

Extracted text: Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the lube and oil change for customers is 9.00 minutes. The manager wishes to estimate the mean time with 99% confidence and a margin of error of + 0.50 minutes. Given this, what must the sample size be? (Hint: Convert Variance to Standard Deviation) A) 239 B) 366 C) 500 D) 414