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A scientist estimates that the mean nitrogen dioxide level in a city is greater than 25...

A scientist estimates that the mean nitrogen dioxide level in a city is greater than 25 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 8. At 0.09​, can you support the​ scientist's estimate?

14 28 39 15 14 19 31 41 18 29 43 18 27 18 36 40 17 36 22 36 25 17 20 36 22 33 29 23

Find the critical value and identify the rejection region?

Math   Statistics-And-Probability   
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