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.
Correct Answer:
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