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Next> Question 13 /1 View Policies Show Attempt History Current Attempt in Progress Aresearcher wants to make a 999% confiden
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sample proportion ,   p̂ =    0.665                          
sampling error ,    E =   0.035                          
Confidence Level ,   CL=   0.99                          
                                  
alpha =   1-CL =   0.01                          
Z value =    Zα/2 =    2.576   [excel formula =normsinv(α/2)]                      
                                  
Sample Size,n = (Z / E)² * p̂ * (1-p̂) = (   2.576   /   0.035   ) ² *   0.67   * ( 1 -   0.67   ) =    1206.60
                                  
                                  
so,Sample Size required=       1207                          

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