A manufacturer claims that the thickness of the metal plates it produces is 2.0mm. A quality control specialist regularly checks this claim. On one production run, he took a random sample of n = 8...

A manufacturer claims that the thickness of the metal plates it produces is 2.0mm. A quality control specialist regularly checks this claim. On one production run, he took a random sample of n = 8 pieces of metal plates and measured their thickness. He obtained:

2.2 2.0 1.9 1.8 2.1 2.5 2.3 2.3

Test the hypothesis of quality control specialists that H_O
:
μ = 2.0 at 0.01 level of significance.

Use 6 steps method.


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