The table below summarizes the number of surface flaws found on the paintwork of new cars following their inspection after primer paint was applied by a new method:
No. of flawsNo. of cars
03
17
212
311
43
52
62

Part a) Find the mean number of flaws per car. Please give your answer to two decimal places.
The mean number of flaws per car is:

Part b) Find the variance of the number of flaws per car. Please give your answer to two decimal places.
The variance of the number of flaws per car is:

You can earn partial credit on this problem.