Answer:
For 99% of confidence interval is 67.5±1.3524
Step-by-step explanation:
Given:
Mean height =67.5 inches
Standard deviation:2.1 inches
Z at 99%.
No of samples 16.
To find: 
confidence interval
Solution:
 We have formula for confidence interval,
=mean ±Z*{standard deviation/sqrt(no.of observation)}
Now 
Z=99%
has  standard  value as ,
Z=2.576
Confidence interval= mean±Z{standard deviation/sqrt(No. of samples)}
=67.5±2.57{(2.1/sqrt(16)}
=67.5±2.576(2.1/4)
=67.5±1.3524
 
        
             
        
        
        
Answer:
i believe that it is 45
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
akjnajknlkicea
Step-by-step explanation:
 
        
             
        
        
        
To find the simpliest form of a fraction, all you need to do is divide the numerator and denominator by their greatest common factor, in which in this case, is 2. And so all you need to do is divide the numerator(42) and the denominator(50) by 2, to get 21/25. This means that the simpliest form of 42/50 is 21/25.
        
                    
             
        
        
        
Answer:
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