home work statistic

  

• Calculation the sample size for large population, assuming: 

• - total number of population = N= 13191

• - 95% confidence level and 

• - p=0.05%. According to him , for 95% confidence level and p = .05 .

• Size of the sample should be :

• Where 

• N = population size 

E = level of precision .      n=N/1+N(e)^2