A random sample of 12 Commercial pilots is taken and are contacted by telephone and asked what their annual salary is. A similar random sample is taken of 14 Fighter pilots. The resulting salary data are listed in fallowing Table, along with the sample means, the population standard deviations. Test the Hypotheses Ho: u1=u2, at a=0.05 Commercial Piolts =70700 AUS$ o1=16253 AUS$ Fighter Pilots =62187 AUS$ o 2=12900 AUS$

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