A bottling company produces bottles that hold 10 ounces of liquid.​ Periodically, the company gets complaints that their bottles are not holding enough liquid. To test the claim that the average...

A bottling company produces bottles that hold 10 ounces of liquid.​ Periodically, the company gets complaints that their bottles are not holding enough liquid. To test the claim that the average amount in the bottles is less than 10​ ounces, the bottling company randomly samples 19 bottles and finds the average amount of liquid held by the bottles is 9.6 ounces with a standard deviation of 0.3 ounce. Calculate the appropriate test statistic.