Nationwide, suppose that drinking water samples have probability 0.04 of having insufficient levels of chlorine. Suppose further that a recent study in alberta showed that 12 of 500 drinking water samples had insufficient levels of chlorine. Does this evidence imply that alberta is significantly under the national average? Test at a 5% significance level and report a p-value.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Nationwide, suppose that drinking water samples have probability 0.04 of having insufficient levels of chlorine. Suppose further that a recent study in alberta showed that 12 of 500 drinking water samples had insufficient levels of chlorine. Does this evidence imply that alberta is significantly under the national average? Test at a 5% significance level and report a p-value. 

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