Question

1. A statistician employed by a consumer testing organization reported that at 95% confidence he has determined that his estimate content of a particular soft drink is within 0.3 ounces of the true population average content. He forgot to report the size of the sample selected. Assuming the population standard deviation is 1.18, determine the size of the sample.

   		12
   		28
   		59
   		60

Answer 1

We have given here,                  
                  
Population standard deviation =1.18  
Margin of error =E=0.3  
Level of significance =   0.05  
Z critical value is (by using Z table)=1.96  
Sample size formula is