4(b - 6) + 19 # Starting equation
4b - 24 + 19 # Using the distributive property
4b - 5           # Simplified expression
        
             
        
        
        
Answer:
The lower bound of a 99% C.I for the proportion of defectives = 0.422 
Step-by-step explanation:
From the given information:
The point estimate = sample proportion 


 = 0.55
At Confidence interval of 99%, the level of significance = 1 - 0.99
= 0.01

Then the margin of error 



E = 0.128156
E ≅ 0.128
At 99% C.I for the population proportion p is: 
= 0.55 - 0.128
= 0.422
Thus, the lower bound of a 99% C.I for the proportion of defectives = 0.422 
 
        
             
        
        
        
•20x200
•4x1000
•8x500
•10x400
•16x250 
•2x2000 
any of those
        
             
        
        
        
Answer:
the answer should be 50
Step-by-step explanation: