The chemist responsible for a ceramics factory evaluated the presence of Cadmium in the vessels produced by the company using a standard leaching test, and the following results were obtained:
[Cd] (mg/L)
0,4887
0,4758
0,5506
0,4838
0,4901
0,4954
The limit value for Cd in the leaching test is established by standard as 0.5000 mg/L. Is there evidence that the average Cadmium content in ceramics is lower than the reference value established by the standard with 95% confidence? Formulate the null and alternative hypotheses, present the critical/tabled values, calculated and complete the test in full
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