Answer:
25 hours
Step-by-step explanation:
 
        
             
        
        
        
Answer:
polkadot's strips 
plain stripes 
polkadot's plain 
Step-by-step explanation:
3
 
        
             
        
        
        
Answer: 2.28 %
Step-by-step explanation:
Given : Mean : 
Standard deviation :
The formula to calculate the z-score :-

For x = 72

The p-value = 

In percent, 
Hence, the  percentage of pediatricians work more than 72 h per week = 2.28 %
 
        
             
        
        
        
18,38,38,40,44,44,44,46,48....
the mean with the outlier (18) included is : 360/9 = 40
38,38,40,44,44,44,46,48
the mean with the outlier (18) excluded is : (360 - 18) / 9 = 342/9 = 38
so when the outlier is removed, the mean is 2 points less