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A sample of 30 observations is selected from a normal population. The sample mean is 21, and the population standard deviation is 6. Conduct the following test of hypothesis using the 0.05 significance level.

  
H0 : μ ≤ 20
H1 : μ > 20

 

a.Is this a one- or two-tailed test?
  
 
 H0, when z >  evidence to conclude that the population mean is greater than 20.

 

e.What is the p-value? (Round your answer to 4 decimal places.)

 

  p-value[removed]   
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    Prof James Kelvin
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