To investigate water quality, in early September 2016, the Ohio Department of Health took water samples at 24 beaches on Lake Erie in Erie County. Those samples were tested for fecal coliform, which is the E.coli bacteria found in human and animal feces. An unsafe level of fecal coliform means there is a higher chance that disease-causing bacteria are present and more risk that a swimmer will become ill if she or he should accidentally ingest some of the water. Ohio considers it unsafe for swimming if a 100-milliliter sample (about 3.4 ounces) of water contains more than 400 coliform bacteria. The E. coli levels found by the laboratories are shown in the table. 18.7 579.4 1986.3 517.2 98.7 45.7 124.6 201.4 19.9 83.6 365.4 307.6 285.1 152.9 18.7 151.5 365.4 238.2 209.8 290.9 137.6 1046.2 127.4 224.7 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt! Take these water samples to be an SRS of the water in all swimming areas in Erie County. Let u represent the mean E. coli counts for all possible 100-mL samples taken from all swimming areas in Erie County. We test Ho: u = 400 versus H. : u < 400 because the researchers are interested in whether the average E. coli levels in these areas are safe. (a) Find x, s, and the t statistic. (Enter your answers rounded to three decimal places) Find the P-value. (Enter your answer rounded to four decimal places.) P- value =
To investigate water quality, in early September 2016, the Ohio Department of Health took water samples at 24 beaches on Lake Erie in Erie County. Those samples were tested for fecal coliform, which is the E.coli bacteria found in human and animal feces. An unsafe level of fecal coliform means there is a higher chance that disease-causing bacteria are present and more risk that a swimmer will become ill if she or he should accidentally ingest some of the water. Ohio considers it unsafe for swimming if a 100-milliliter sample (about 3.4 ounces) of water contains more than 400 coliform bacteria. The E. coli levels found by the laboratories are shown in the table. 18.7 579.4 1986.3 517.2 98.7 45.7 124.6 201.4 19.9 83.6 365.4 307.6 285.1 152.9 18.7 151.5 365.4 238.2 209.8 290.9 137.6 1046.2 127.4 224.7 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt! Take these water samples to be an SRS of the water in all swimming areas in Erie County. Let u represent the mean E. coli counts for all possible 100-mL samples taken from all swimming areas in Erie County. We test Ho: u = 400 versus H. : u < 400 because the researchers are interested in whether the average E. coli levels in these areas are safe. (a) Find x, s, and the t statistic. (Enter your answers rounded to three decimal places) Find the P-value. (Enter your answer rounded to four decimal places.) P- value =
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
Related questions
Question
Transcribed Image Text:To investigate water quality, in early September 2016, the Ohio Department of Health took water samples at 24 beaches on
Lake Erie in Erie County. Those samples were tested for fecal coliform, which is the E.coli bacteria found in human and
animal feces. An unsafe level of fecal coliform means there is a higher chance that disease-causing bacteria are present and
more risk that a swimmer will become ill if she or he should accidentally ingest some of the water. Ohio considers it unsafe
for swimming if a 100-milliliter sample (about 3.4 ounces) of water contains more than 400 coliform bacteria. The E. coli
levels found by the laboratories are shown in the table.
18.7
579.4
1986.3
517.2
98.7
45.7
124.6
201.4
19.9
83.6
365.4
307.6
285.1
152.9
18.7
151.5
365.4
238.2
209.8
290.9
137.6
1046.2
127.4
224.7
To access the complete data set, click the link for your preferred software format:
Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt!
Take these water samples to be an SRS of the water in all swimming areas in Erie County. Let u represent the mean E. coli
counts for all possible 100-mL samples taken from all swimming areas in Erie County. We test
Ho: u = 400 versus H. : u < 400 because the researchers are interested in whether the average E. coli levels in these
areas are safe.
Transcribed Image Text:(a) Find x, s, and the t statistic. (Enter your answers rounded to three decimal places)
Find the P-value. (Enter your answer rounded to four decimal places.)
P- value =
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