The following data represents the dissolved oxygen readings in ppm taken upstream and below stream from a community river.

Above

5.2

4.8

5.1

5.0

4.9

4.8

5.0

4.7

4.7

5.0

4.7

5.1

5.0

4.9

4.9

Below

4.2

4.4

4.7

4.9

4.6

4.8

4.9

4.6

5.1

4.3

5.5

4.7

4.9

4.8

4.7

Using alpha = 0.01, Perform a hypothesis test to test whether the mean oxygen levels upstream (above) is unequal to

the mean oxygen content downstream (below) and draw a conclusion.