Valvoline had an advertisement showing:  mean  time for an oil change is less than 15 min    They took a sample of 16 oil changes to get:    standard deviation of 4 minutes. mean of 14 minutes    (a) At α=10%, useclassical approach to test the claim. (b) Use P-value approach to conclude it.

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  • Valvoline had an advertisement showing:
  •  mean  time for an oil change is less than 15 min 
  •  
  • They took a sample of 16 oil changes to get: 
  •  
  • standard deviation of 4 minutes.
  • mean of 14 minutes 
  •  
  • (a) At α=10%, useclassical approach to test the claim.
  • (b) Use P-value approach to conclude it.

 

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