A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 5 days, he took n = data is summarized in the ogive graph shown below. 20 measurements (in ppb). His sample 15 10 10 15 20 25 30 35 40 45 50 55 Arsenic (ppb) How many measurements taken in this time frame were within 35, 40) ppb?

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Chapter1: Combinatorial Analysis
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A researcher for the EPA measured the amount of arsenic in the water near a sewage
treatment plant. Over 5 days, he took n = 20 measurements (in ppb). His sample
data is summarized in the ogive graph shown below.
20
15
10
10 15 20 25 30 35 40 45 50 55
Arsenic (ppb)
How many measurements taken in this time frame were within 35, 40) ppb?
ans =
Transcribed Image Text:A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 5 days, he took n = 20 measurements (in ppb). His sample data is summarized in the ogive graph shown below. 20 15 10 10 15 20 25 30 35 40 45 50 55 Arsenic (ppb) How many measurements taken in this time frame were within 35, 40) ppb? ans =
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