1. A consumer group is testing camp stoves. To test the heating capacity of a stove, they measure the time required to bring 2 liters of water from 30 degrees to boiling.

Two competing models are under consideration. Ten stoves of the first model and 12 stoves of the second model are tested. The following results are obtained.

Model 1: mean time is 11.4 and standard deviation is2.5

Model 2: mean time is 9.9 and standard deviation is 3.0

1. Is there any difference between the performances of these two models? 
2. 
   
3. Find the p-value of the sample statistic and do a significance test.
4. 
   
5. Find a 95% confidence interval for the difference of the means.

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Answer Excel Addon PHStat used 1 A consumer group is testing camp stoves To test the heating capacit... View the full answer