Giving the following situation, a bottling factory for Pepsi…

Giving the fоllоwing situаtiоn, а bottling fаctory for PepsiCo wants to know if they are filling their 1-liter bottles with the correct amount of Pepsi.  They will take samples of filled bottles from the filling process and measure how much soft drink is in each bottle. Which quality control method of those listed below would be the most appropriate to answer their question.