Answer:
4.5
Step-by-step explanation:
8 + 7 + 6 + 5 + 4 + 3 + 2 + 1/8
36/8
=4.5
 
        
             
        
        
        
1. Answer A and C
2. Answer B
Sorry if I’m wrong
        
                    
             
        
        
        
Answer:
A) No
B) No
C) Yes
Step-by-step explanation:
A)  2 out of three observations is equal to
2/3  = 0.67    or  67 %
We know tha the interval 
[μ  -  σ/2 ,  μ + σ/2]  is approximately 68.3 % of the values
Therefore 2 out of 3 would not fall in that interval
B)
4 out of  5   is  4/5    = 0,8     or 80 %  If we  examine the interval
[μ  -  σ ,  μ + σ ]   which is approximately 95. Then value 4/5  ( 0,8)
Therefore 0,8 is out of the interval
C) 19/20 = 0,95     or 95 % is almost exact the value for the interval
[μ  -  1.5σ ,  μ + 1.5σ ]  That value is inside  μ - 2σ , μ + 2
 
        
             
        
        
        
Answer:
3
Step-by-step explanation: