Sewage and industrial pollutants dumped into a body of water can reduce the diss

Question

Sewage and industrial pollutants dumped into a body of water can reduce the dissolved oxygen concentration and adversely affect aquatic species. In one study, weekly readings are taken from the same location in a river over a two-month period.

Some scientists think that 5.0 ppm is a dissolved O2 level that is marginal for fish to live. Conduct a statistical test to determine whether the mean dissolved O2 concentration is less than 5.0 ppm at the 95% confidence level.

Is the mean O2 concentration indeed less than 5.0 ppm at the stated confidence level?

Please show all work/equations/steps thank you!!!

Explanation / Answer

https://junsay.files.wordpress.com/2009/11/ch-35-statistical-treatment.pdf

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