Heavy metals in drinking water can be toxic at high levels. Below is a table showing the Arsenic readings (ug/L)in several sites of a reservoir sampled at the bottom and at the surface (for every sampling site). Using 10 steps of hypothesis testing, find out if Arsenic levels are different for bottom and surface readings across all sites. Provide needed computations for appropriate steps of the test. Discuss why your test is appropriate and your results.

Heavy metals in drinking water can be toxic at high levels. Below is a table showing the Arsenic readings (ug/L) in several sites of a reservoir sampled at the bottom and at the surface (for every sampling site). Using 10 steps of hypothesis testing, find out if Arsenic levels are different for bottom and surface readings across all sites. Provide needed computations for appropriate steps of the test. Discuss why your test is appropriate and your results. Bottom 2.5 3.4 7.1 6.3 2.4 3.7 5.5 4.1 3.7 2.8 5.9 6.3 5.2 Surface 1.5 2.2 1.8 2.7 1.1 1.8 2.4 1.3 1.1 2.5 2.0 3.2 1.2