Question
An industrial company claims that the mean pH level of the water in a nearby river is 6.8. To test this claim you randomly select
An industrial company claims that the mean pH level of the water in a nearby river is 6.8.
To test this claim you randomly select 19 water samples and measure the pH of each.
The sample mean is 6.7, and the standard deviation of the sample is 0.24.
At the .05 significance level, does this sample provide evidence to refute the company's claim?
a. Yes, because the p-value is less than the significance level.
b. No, because p = .0860 is greater than .05.
c. No, because -1.816 is less than the p-value
d. Yes, because the test statistic is less than the significance level.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started