Answer:
0.1994 is the required probability.       
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 166 pounds
Standard Deviation, σ = 5.3 pounds
Sample size, n = 20
We are given that the distribution of weights is a bell shaped distribution that is a normal distribution.
Formula:
 
Standard error due to sampling = 

P(sample of 20 boxers is more than 167 pounds)
 
 
Calculation the value from standard normal z table, we have,  
 
0.1994 is the probability that the mean weight of a random sample of 20 boxers is more than 167 pounds
 
        
             
        
        
        
Answer:
Slope = 1
Step-by-step explanation:
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
You use the quadratic equation and substitute these values from the equation given
a=1,b=5, c=2
Which gives you the value of option A