EXERCISE 5

The Quality Inspector of a bottle company checks a random sample of 7 elements in two different processes that make the same product and checks the liquid in them.

The results are:

PROCESS 1: 50 49.9 50.2 50.1 50 49.8 50.3

PROCESS 2: 50,2 48,95 49,2 49,5 49,7 50 49,8

Do you think that the production of this plant is following a standard process? Test with an alpha-level of 5 per cent.