- 2 The Concentration Levels Ug Of Zinc In Drinking Water Were Measured At 8 Different Locations For Each Location Th 1 (287.12 KiB) Viewed 34 times
2. The concentration levels (ug\?)of Zinc in drinking water were measured at 8 different locations. For each location th
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2. The concentration levels (ug\?)of Zinc in drinking water were measured at 8 different locations. For each location th
2. The concentration levels (ug\?)of Zinc in drinking water were measured at 8 different locations. For each location the concentration levels were sampled from the surface and bottom of the water. The following are the results. Location Number Bottom Concentration: Surface Concentration: 1 170.0 168.5 2 182.6 177.8 3 178.4 186.8 4 197.7 186.9 5 182.3 181.0 6 186.4 199.8 7 168.4 187.5 8 194.3 184.4 (a) Are these paired or independent samples? Why? [5] (b) Researchers want to test the hypothesis that zinc concentration at the bot- tom of water is less than that at the surface. State the null and alternative hypothesis. [5] (c) Conduct a hypothesis test using significance level a = 0.1. State your conclu- sion. [10]
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