1 answer

Statistics

Question:

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.

How many measurements taken in this time frame were less than 30 ppb?arsenic.PNG


Answers

answer: 10 look in the y axis and it is between of 25 and 30

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