Question

Four different power plants operated by the same power utility are monitored in terms of their greenhouse gas emissions. The utility has taken 4 samples from the flue gases of each one, during different times of the day, and has measured the dust emission content (mg per m^3 ). The data is provided below. Does the data provide sufficient evidence to indicate a difference in the mean amount of carbon dioxide pollution? Use alpha = 0.05.

Power Plant

Emissions

A

20

23

17

19

B

21

22

19

18

C

24

17

17

21

D

23

19

17

18

Answer 1