Answer: 1.53
Step-by-step explanation:
The given data : 4, 4, 4, 4, 6, 8
Number of data values : n= 6
The mean value of the given data will be  :-

The formula to find standard deviation:_
![\sqrt{\dfrac{\sum(x-\overline{x})^2}{n}]](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cdfrac%7B%5Csum%28x-%5Coverline%7Bx%7D%29%5E2%7D%7Bn%7D%5D)
Now,

The standard deviation will be :-

 
        
             
        
        
        
Answer:
Step-by-step explanation:
821
200
 
        
                    
             
        
        
        
-12 and 18
hope this helps :)
        
                    
             
        
        
        
The complementary is not entering the store one minute before closing.
The probability of not entering the store one minute before closing is 75%