SAT, 15.10.2020 05:01, emiller6462

A estimates that the mean nitrogen dioxide level in a city is greater than 28 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 to the right . Assume that the population standard deviation is 10. At a = 0.12 , can you support the scientist's estimate ? Complete parts ( a ) through ( e ) .

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A estimates that the mean nitrogen dioxide level in a city is greater than 28 parts per billion . To...