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...

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.