A bottling company fills bottles with a mean of 500 mL of liquid, with a standard deviation of 2 mL. Quality control randomly samples 20 bottles at a time. Consider the mean volume of liquid in the sample bottles. What is the mean of the sampling distribution of this sample mean?
- 25 mL
- 500 mL
- 250 mL
- 111.80 mL
- 1000 mL