Mathematics, 28.11.2019 07:31 Andinojose

Ascientist estimates that the mean nitrogen dioxide level in a city is greater than 30 parts per billion. to test this estimate, you determine the nitrogen dioxide levels for 31 randomly selected days. the results (in parts per billion) are listed below.

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Ascientist estimates that the mean nitrogen dioxide level in a city is greater than 30 parts per bil...

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