A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant.

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A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant.

A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 5 days, he took n measurements (in ppb). His sample data is summarized in the ogive graph shown below.

How many measurements taken in this time frame were within (60, 65) ppb?

math Statistics-And-Probability

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Answer 1

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Answer #1

In the ogive graph, for x = 60, y (number of measurements) = 10
For x = 65, y (number of measurements) = 14
Number of measurements within [60, 65) = 14 - 10 = 4

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Answer 2

Answer #2

9 the yellow dot to the left of 60

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Answer 3

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