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4-Suppose that sample results representative of the times for Delta Airlines and Northwest Airlines to locate...

4-Suppose that sample results representative of the times for Delta Airlines and Northwest Airlines to locate flight information on their Internet web sites are as follows:

Delta:                                                                                                                             Northwest:

Sample Mean = 2.5 minutes                                                                                     Sample Mean = 2.1 minutes

Sample Standard Deviation = 0.8 minutes                                                               Sample Standard Deviation = 1.1 minutes

Sample Size = 22                                                                                                      Sample Size = 20                

  1. Formulate the hypotheses if the purpose is to test for a significant difference between the mean times for the two airlines.
  2. Perform the test and describe your conclusion, using 0.05 level of significant.

Please show calculation on paper. Thank you.

Math   Statistics-And-Probability   
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