2 Reject or fail to reject the Ho Show the Math Ho Mu 23 H

2. Reject or fail to reject the Ho? Show the Math Ho= Mu > = 23 Ha: Mu

Solution

Formulating the null and alternative hypotheses,              
              
Ho:   u   >=   23  
Ha:    u   <   23  
              
As we can see, this is a    left   tailed test.      
              
Thus, getting the critical t,              
df = n - 1 =    24          
tcrit =    -   2.063898562      
              
Getting the test statistic, as              
              
X = sample mean =    20          
uo = hypothesized mean =    23          
n = sample size =    25          
s = standard deviation =    8          
              
Thus, t = (X - uo) * sqrt(n) / s =    -1.875          
              
Also, the p value is              
              
p =    0.036506319          
              
As |t| < 2.064 (or P > 0.025), we   FAIL TO REJECT THE NULL HYPOTHESIS.   [ANSWER]      
          

 2. Reject or fail to reject the Ho? Show the Math Ho= Mu > = 23 Ha: Mu SolutionFormulating the null and alternative hypotheses, Ho: u >= 23 Ha: u < 23

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