Dissolved O 2 Content Industrial wastes and sewage dumped into our rivers and streams absorb oxygen… 1 answer below »

An estimated odds ratio for adult females between the presence of squamous cell carcinoma (yes, no)…
December 17, 2021
1. In general, when selecting factors for a study, you want to be sure of which of these? a. they ha
December 17, 2021

Dissolved O2 Content Industrial wastes and sewage dumped into our rivers and streams absorb oxygen and thereby reduce the amount of dissolved oxygen available for fish and other forms of aquatic life. One state agency requires a minimum of 5 parts per million (ppm) of dissolved oxygen in order for the oxygen content to be sufficient to support aquatic life. Six water specimens taken from a river at a specific location during the low-water season (July) gavereadings of 4.9, 5.1, 4.9, 5.0, 5.0, and 4.7 ppm of dissolved oxygen. Do the data provide sufficient evidence to indicate that the dissolved oxygen content is less than 5 ppm? Test using a = .05.

 
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