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To test whether the mean amount of air pressure is same for air pumps produced by 3 manufacturers, a party consultant employs the three pumps to blow up 4 different balloons.  The times needed to fill the balloons are below.

Manufacturer A Manufacturer B Manufacturer C
25 25 25
28 24 26
29 28 27
28 27 26

Employ the data to test whether the population means for the air pressure for pumps differ for the three manufacturers.  Employ a = 0.10.  Show all five steps of hypothesis testing process. Points will be deducted for missing parts; however, this might be done by using the calculator functions. (State which calculator menus were used.)

Statistics and Probability, Statistics

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