Is there enough evidence at α= 0.05 to reject the claim that the pH level is 6.8
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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
An industrial company claims that the mean pH level of the water in a nearby river is 6.8. You randomly select 19 water samples and measure the pH of each. The sample mean and the sample standard deviation are 7.0 and 0.24, respectively. Is there enough evidence at α= 0.05 to reject the claim that the pH level is 6.8? Assume a
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