Question

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 this claim, the bottling company randomly samples 22 bottles and finds the average amountof liquid held by the bottles is 9.7 ounces with a standard deviation of .2 ounce. ?=0.1( CV method)

Answer 1

The test hypothesis is

This is a left-tailed test because the alternative hypothesis is formulated to detect claim if mean is less than 10.0.
Now, the value of test static can be found out by following formula:

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