Problem

Health Federal guidelines require drinking water to have less than .050 milligrams per lit...

Health Federal guidelines require drinking water to have less than .050 milligrams per liter of lead. A test using 21 samples of water in a Midwestern city found that the average amount of lead in the samples was 0.040 milligrams per liter. All samples had lead content within 5% of the average.

(a) Select a variable and write down what it represents.


(b) Write an inequality to express the results obtained from the sample.


(c) Did all the samples meet the federal requirement?

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