D-83086 18 Process of Science: Discovering Flint\'s Water Crisis C5 of 5 load in
ID: 289785 • Letter: D
Question
D-83086 18 Process of Science: Discovering Flint's Water Crisis C5 of 5 load in their water The DEQ reported that less rar, 10% of homes in Flit had high lead levels, and therefore no acton was taken the sample size in the DEQ study was large enough. Sample size refers to the number of samples collected and tested in a particular study This table shows the FWS results compared to the DEQ results (Flint is divided into 9 areas called wards, and water samples were taken from each ward) ofDEQ Percentege of DEQ Number of Number of FWS Percentage of FWS rtaken by 15ppb high lead 15 ppb high ead taken by 15 ppb high lead 15 ppb high lead Ward a standard DEQ 24 11% 15 21% 41 Total 270 $27 O 9Explanation / Answer
2.The FWS had a sample size that was about 4 times larger tahn the DEQ study.
As 270/69 = 3.91 (nearly 4)
4.Overall theDEQ study found about 9 %of houses sampled had high lead level,
As 52/6 =8.67 (nearly 9)
5.the results from FWS are more reliable than the results from DEQ
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