The Introductory Biology Class at State University Is Conducting a Study

question 21

Multiple Choice

The introductory biology class at State University is conducting a study of water quality in their local community.The population mean of a certain beneficial bacteria found in drinking water ( ) is 100,with .The bacteria counts from the community are given below.Use a two-tailed rejection region with a total area of 0.05.What should you conclude?

• A)Since the z-value falls within the region of rejection,we should conclude this sample mean likely represents some other population.
• B)Since the z-value does not fall within the region of rejection,we should not conclude this sample mean represents some other population.
• C)Since the z-value falls within the region of rejection,we should not conclude this sample mean represents some other population.
• D)Since the z-value does not fall within the region of rejection,we should conclude this sample mean likely represents some other population.