Question 1<\/h3>\r\nBased on your previous reading, why do you think the EPA monitors the amount of lead in drinking water?\r\n\r\n<\/div>\r\n\r\nQuestion 2<\/h3>\r\nA 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[footnote]Lead testing results for water sampled by residents.<\/em> (2015, September). Flint Water Study Updates. http:\/\/flintwaterstudy.org\/information-for-flint-residents\/results-for-citizen-testing-for-lead-300-kits\/ [\/footnote] At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?\r\n\r\n \t- Write the null hypothesis in symbols and in a complete sentence.<\/li>\r\n \t
- Write the alternative hypothesis in symbols and in a complete sentence.<\/li>\r\n \t
- Verify that the conditions for the one-sample z-test for proportions have been met.<\/li>\r\n \t
- Go to the DCMP Inference for Population Proportion tool at\u00a0 https:\/\/dcmathpathways.shinyapps.io\/Inference_prop\/. Calculate the test statistic and P-value.<\/li>\r\n \t
- Will the null hypothesis be rejected? Explain.<\/li>\r\n \t
- At the 1% significance level, do the data indicate that the city of Flint exceeded the EPA standard? Write the conclusion in a sentence.<\/li>\r\n<\/ol>\r\n<\/div>\r\n\r\n
Question 3<\/h3>\r\nWhy do you think a 1% significance level is used here? Why not 10%? Or 5%?\r\n\r\n<\/div>\r\n\r\nQuestion 4<\/h3>\r\nSuppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?\r\n\r\n<\/div>\r\n ","rendered":"
According to the U.S. Environmental Protection Agency (EPA), if more than 10% of\u00a0 homes in a city record over 15 parts per billion (ppb) of lead in their drinking water, the\u00a0 city exceeds Federal standards for lead in drinking water.<\/p>\n
![\"\"](\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/5738\/2022\/08\/19223828\/11D-InClass-225x300.jpg\")
<\/p>\n
Credit: iStock\/kedsanee<\/p>\n
\nQuestion 1<\/h3>\n
Based on your previous reading, why do you think the EPA monitors the amount of lead in drinking water?<\/p>\n<\/div>\n
\nQuestion 2<\/h3>\n
A 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[1]<\/sup><\/a> At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?<\/p>\n\n- Write the null hypothesis in symbols and in a complete sentence.<\/li>\n
- Write the alternative hypothesis in symbols and in a complete sentence.<\/li>\n
- Verify that the conditions for the one-sample z-test for proportions have been met.<\/li>\n
- Go to the DCMP Inference for Population Proportion tool at\u00a0 https:\/\/dcmathpathways.shinyapps.io\/Inference_prop\/. Calculate the test statistic and P-value.<\/li>\n
- Will the null hypothesis be rejected? Explain.<\/li>\n
- At the 1% significance level, do the data indicate that the city of Flint exceeded the EPA standard? Write the conclusion in a sentence.<\/li>\n<\/ol>\n<\/div>\n\n
Question 3<\/h3>\n
Why do you think a 1% significance level is used here? Why not 10%? Or 5%?<\/p>\n<\/div>\n
\nQuestion 4<\/h3>\n
Suppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?<\/p>\n<\/div>\n
<\/p>\n
Question 2<\/h3>\r\nA 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[footnote]Lead testing results for water sampled by residents.<\/em> (2015, September). Flint Water Study Updates. http:\/\/flintwaterstudy.org\/information-for-flint-residents\/results-for-citizen-testing-for-lead-300-kits\/ [\/footnote] At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?\r\n\r\n \t- Write the null hypothesis in symbols and in a complete sentence.<\/li>\r\n \t
- Write the alternative hypothesis in symbols and in a complete sentence.<\/li>\r\n \t
- Verify that the conditions for the one-sample z-test for proportions have been met.<\/li>\r\n \t
- Go to the DCMP Inference for Population Proportion tool at\u00a0 https:\/\/dcmathpathways.shinyapps.io\/Inference_prop\/. Calculate the test statistic and P-value.<\/li>\r\n \t
- Will the null hypothesis be rejected? Explain.<\/li>\r\n \t
- At the 1% significance level, do the data indicate that the city of Flint exceeded the EPA standard? Write the conclusion in a sentence.<\/li>\r\n<\/ol>\r\n<\/div>\r\n\r\n
Question 3<\/h3>\r\nWhy do you think a 1% significance level is used here? Why not 10%? Or 5%?\r\n\r\n<\/div>\r\n\r\nQuestion 4<\/h3>\r\nSuppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?\r\n\r\n<\/div>\r\n ","rendered":"
According to the U.S. Environmental Protection Agency (EPA), if more than 10% of\u00a0 homes in a city record over 15 parts per billion (ppb) of lead in their drinking water, the\u00a0 city exceeds Federal standards for lead in drinking water.<\/p>\n
<\/p>\n
Credit: iStock\/kedsanee<\/p>\n
\nQuestion 1<\/h3>\n
Based on your previous reading, why do you think the EPA monitors the amount of lead in drinking water?<\/p>\n<\/div>\n
\nQuestion 2<\/h3>\n
A 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[1]<\/sup><\/a> At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?<\/p>\n\n- Write the null hypothesis in symbols and in a complete sentence.<\/li>\n
- Write the alternative hypothesis in symbols and in a complete sentence.<\/li>\n
- Verify that the conditions for the one-sample z-test for proportions have been met.<\/li>\n
- Go to the DCMP Inference for Population Proportion tool at\u00a0 https:\/\/dcmathpathways.shinyapps.io\/Inference_prop\/. Calculate the test statistic and P-value.<\/li>\n
- Will the null hypothesis be rejected? Explain.<\/li>\n
- At the 1% significance level, do the data indicate that the city of Flint exceeded the EPA standard? Write the conclusion in a sentence.<\/li>\n<\/ol>\n<\/div>\n\n
Question 3<\/h3>\n
Why do you think a 1% significance level is used here? Why not 10%? Or 5%?<\/p>\n<\/div>\n
\nQuestion 4<\/h3>\n
Suppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?<\/p>\n<\/div>\n
<\/p>\n
Question 3<\/h3>\r\nWhy do you think a 1% significance level is used here? Why not 10%? Or 5%?\r\n\r\n<\/div>\r\n\r\nQuestion 4<\/h3>\r\nSuppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?\r\n\r\n<\/div>\r\n ","rendered":"
According to the U.S. Environmental Protection Agency (EPA), if more than 10% of\u00a0 homes in a city record over 15 parts per billion (ppb) of lead in their drinking water, the\u00a0 city exceeds Federal standards for lead in drinking water.<\/p>\n
<\/p>\n
Credit: iStock\/kedsanee<\/p>\n
\nQuestion 1<\/h3>\n
Based on your previous reading, why do you think the EPA monitors the amount of lead in drinking water?<\/p>\n<\/div>\n
\nQuestion 2<\/h3>\n
A 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[1]<\/sup><\/a> At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?<\/p>\n\n- Write the null hypothesis in symbols and in a complete sentence.<\/li>\n
- Write the alternative hypothesis in symbols and in a complete sentence.<\/li>\n
- Verify that the conditions for the one-sample z-test for proportions have been met.<\/li>\n
- Go to the DCMP Inference for Population Proportion tool at\u00a0 https:\/\/dcmathpathways.shinyapps.io\/Inference_prop\/. Calculate the test statistic and P-value.<\/li>\n
- Will the null hypothesis be rejected? Explain.<\/li>\n
- At the 1% significance level, do the data indicate that the city of Flint exceeded the EPA standard? Write the conclusion in a sentence.<\/li>\n<\/ol>\n<\/div>\n\n
Question 3<\/h3>\n
Why do you think a 1% significance level is used here? Why not 10%? Or 5%?<\/p>\n<\/div>\n
\nQuestion 4<\/h3>\n
Suppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?<\/p>\n<\/div>\n
<\/p>\n
Question 4<\/h3>\r\nSuppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?\r\n\r\n<\/div>\r\n ","rendered":"
According to the U.S. Environmental Protection Agency (EPA), if more than 10% of\u00a0 homes in a city record over 15 parts per billion (ppb) of lead in their drinking water, the\u00a0 city exceeds Federal standards for lead in drinking water.<\/p>\n
<\/p>\n
Credit: iStock\/kedsanee<\/p>\n
Question 1<\/h3>\n
Based on your previous reading, why do you think the EPA monitors the amount of lead in drinking water?<\/p>\n<\/div>\n
Question 2<\/h3>\n
A 2015 Virginia Tech study reported that out of a sample of 252 homes in Flint,\u00a0 Michigan, 42 of them had over 15 ppb of lead in their drinking water.[1]<\/sup><\/a> At the 1%\u00a0 significance level, do the data indicate that the city of Flint exceeded the EPA\u00a0 standard?<\/p>\n Why do you think a 1% significance level is used here? Why not 10%? Or 5%?<\/p>\n<\/div>\n Suppose our sample resulted in a P-value of 0.023. Would it be okay to make a\u00a0 conclusion at the 5% significance level instead?<\/p>\n<\/div>\n <\/p>\n\n
Question 3<\/h3>\n
Question 4<\/h3>\n