ummhio1035
ummhio1035 ummhio1035
  • 06-09-2022
  • Mathematics
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A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 12 days, he took n = 40 measurements (in ppb). His sample data is summarized in the frequency polygon shown below. How many measurements taken in this time frame were within (30, 35)ppd?

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