- Complete a one-sample [latex]z[/latex]-test for proportions from hypotheses to conclusions.
- Use a P-value to explain the conclusions of a completed [latex]z[/latex]-test for proportions.
Drinking Water
From 2014 to early 2019, Flint, Michigan was in the news because of contaminated water.
- To get a better idea of what has occurred in Flint, Michigan, visit https://www.nrdc.org/stories/flint-water-crisis-everything-you-need-know.
- To understand the problems that have occurred because of lead-contaminated water here, visit: https://www.nrdc.org/stories/flint-water-crisis-everything-you-need-know#sec-whyis.
According to the U.S. Environmental Protection Agency (EPA), if more than [latex]10\%[/latex] of homes in a city record over [latex]15[/latex] parts per billion (ppb) of lead in their drinking water, the city exceeds Federal standards for lead in drinking water.