Answer:
0.5 onces
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
a) 
With:


b) 

c) 

d) 


Step-by-step explanation:
For this case we know the following propoertis for the random variable X

We select a sample size of n = 81
Part a
Since the sample size is large enough we can use the central limit distribution and the distribution for the sampel mean on this case would be:

With:


Part b
We want this probability:

We can use the z score formula given by:

And if we find the z score for 89 we got:


Part c

We can use the z score formula given by:

And if we find the z score for 75.65 we got:


Part d
We want this probability:

We find the z scores:



 
        
             
        
        
        
It's visually better to make it an equation. 
-1 3/5  ÷ -2/3 
The answer is 39/10.  
        
                    
             
        
        
        
Answer:
x = 3 x = ‐1/4
Step-by-step explanation:
Was right on the quiz