Answer:
800+200
Step-by-step explanation:
 
        
                    
             
        
        
        
(-24)+9=-15
(-15)-9=-24
n=-15
        
                    
             
        
        
        

There is one-sided horizontal asymptote 
 
        
             
        
        
        
Answer:
Null hypothesis is rejected. Standard deviation is > 8 miles per hour 
Step-by-step explanation:
σ [Population standard deviation] = 8 , s [sample standard deviation] = s 
n [no of items] = 8 
H0 [Null] : σ = 8 ; H1 [Alternate - Right Tail] : σ > 8 
χ2 = (n - 1) . s^2 / σ^2 
= 49 x (10.5)^2 / 82 = 5402.25 / 64
χ2 = 84.410 
df [degree of freedom] = n -1 = 50 - 1 = 49 
P value (χ^2 49 > 84.410) = 0.00125 
p = 0.0013 
p < α ie 0.05 
So, H0 is rejected 
Hence we state that standard deviation is > 8 miles per hpur