Question
A factory owner is told to reduce their air emissions from the emissions stack at the production facility using a filter to catch particulate matter.
A factory owner is told to reduce their air emissions from the emissions stack at the production facility using a filter to catch particulate matter. Particulate matter emitted is normally distributed with a mean of 35.2 micrograms for 24 hours. This factory will face penalties if the particulate matter is not reduced, so the owner wants to be sure that the filter is working and reducing the particulate matter emitted. The owner collected 9 samples (each from a 24-hour 7 period) and found that the mean particulate matter emitted is 32.93 with a standard deviation of 2.70. Using a 0.01 significance level, test the claim that the mean particulate matter emitted with the filter is lower than 35.2 micrograms per 24 hours. What should you conclude?
- a. Reject the H0 due to insufficient evidence and conclude that the mean particulate matter emitted with the filter is lower than 35.2 micrograms per 24-hours.
- b. Reject the H0 due to sufficient evidence and conclude that the mean particulate matter emitted with the filter is lower than 35.2 micrograms per 24-hours.
- c. Accept the H0 due to sufficient evidence and conclude that the mean particulate matter emitted with the filter is lower than 35.2 micrograms per 24-hours.
- d. Fail to reject the H0 due to insufficient evidence and conclude that the mean particulate matter emitted with the filter is not lower than 35.2 micrograms per 24-hours.
- e. Fail to reject the H0 due to sufficient evidence and conclude that the mean particulate matter emitted with the filter is not lower than 35.2 micrograms per 24-hours.
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