A company has two factories, one in the UK and one in the Germany. There is a view that the German factory is more effic

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A company has two factories, one in the UK and one in the
Germany. There is a view that the German factory is more efficient
than the British one, and to test this, a random sample is selected
from each of the factories. The British sample consists of 20
workers who takes an average of 25 minutes to complete a standard
task. Their standard deviation is five minutes. The German sample
has 15 workers who take an average of 20 minutes to complete the
same task, and the sample has a standard deviation of four minutes.
Use an appropriate hypothesis test, at the one percent level of
significance to find if the German workers are more efficient