Testing the toxicity of water


Suppose you're trying to measure the Selenium toxicity in your tap water, and obtain the following values for each day:

day selenium
1 0.051
2 0.0505
3 0.049
4 0.0516
5 0.052
6 0.0508
7 0.0506

The maxiumum level for safe drinking water is 0.05 mg/L -- using this as your alpha, does the selenium tap level exceed the legal limit? Hint: you can use a t-test here


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