Five specimens of untreated wastewater produced at a gas field had an average benzene
Chapter 5, Problem 2(choose chapter or problem)
Five specimens of untreated wastewater produced at a gas field had an average benzene concentration of \(6.83 \mathrm{mg} / \mathrm{L}\) with a standard deviation of \(1.72 \mathrm{mg} / \mathrm{L}\). Seven specimens of treated wastewater had an average benzene concentration of \(3.32 \mathrm{mg} / \mathrm{L}\) with a standard deviation of \(1.17 \mathrm{mg} / \mathrm{L}\). Find a \(95 \%\) confidence interval for the reduction in benzene concentration after treatment.
Equation Transcription:
Text Transcription:
6.83 mg/L
1.72 mg/L
3.32 mg/L
1.17 mg/L
95%
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