A 97% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina
ry sample standard deviation is 1.4. The smallest sample size n that provides the desired accuracy is
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer:
The sample size will be " ". A further explanation is given below.
". A further explanation is given below.
Step-by-step explanation:
Let the sample size will be:
= n
The given values are:
Standard deviation,
= 1.4
ME,
= 0.3
As we know,
⇒ 
On putting the estimated values, we get
⇒    
⇒    
⇒    
 
                                
             
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