The pH of an acid solution used to etch aluminum varies somewhat from batch to batch. In
Question:
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 μ represent the mean pH for batches of this solution.
a. Find the P-value for testing H0 :μ ≤ 2.5 versus H1 :μ > 2.5.
b. Either the mean pH is greater than 2.5 mm, or the sample is in the most extreme % of its distribution.
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a To find the Pvalue for this hypothesis test we need to calculate the probability of observing ...View the full answer
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