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5. A new method for measuring NO2 in air was developed and compared to a conventional method with  the results summarized in the following table:  Method             Average concentration (ppb)        Standard deviation (ppb)      Number of measurements Conventional            56.0                                                                   3.1                                                         7 New                               51.9                                                                   2.8                                                         8 a) Is the standard deviation for the new method significantly different from that of the conventional  method?  b) Does the new method give an average concentration similar to the conventional method at the  95% confidence level?

5. A new method for measuring NO2 in air was developed and compared to a conventional method with  the results summarized in the following table:  Method             Average concentration (ppb)        Standard deviation (ppb)      Number of measurements Conventional            56.0                                                                   3.1                                                         7 New                               51.9                                                                   2.8                                                         8 a) Is the standard deviation for the new method significantly different from that of the conventional  method?  b) Does the new method give an average concentration similar to the conventional method at the  95% confidence level?

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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5. A new method for measuring NO2 in air was developed and compared to a conventional method with 
the results summarized in the following table: 

Method             Average concentration (ppb)        Standard deviation (ppb)      Number of measurements
Conventional            56.0                                                                   3.1                                                         7
New                               51.9                                                                   2.8                                                         8

a) Is the standard deviation for the new method significantly different from that of the conventional 
method? 

b) Does the new method give an average concentration similar to the conventional method at the 
95% confidence level? 

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