The pH of an acid solution used to etch aluminum varies somewhat from batch to batch. In
Chapter 6, Problem 4(choose chapter or problem)
The pH of an acid solution used to etch aluminum varies somewhat from batch to batch. In a sample of 50 batches the mean pH was 2.6, with a standard deviation of 0.3. Let \(\mu\) represent the mean pH for batches of this solution.
a. Find the P-value for testing \(H_{0}: \mu \leq 2.5 \text { versus } H_{1}: \mu>2.5\)
b. Either the mean pH is greater than \(2.5 \mathrm{~mm}\), or the sample is in the most extreme % of its distribution.
Equation Transcription:
Text Transcription:
\mu
H_0: \mu \leq 2.5 versus H_1: \mu>2.5
2.5 mm
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