Answer:
Step-by-step explanation:
Given that Ten fish from each species were randomly selected from each of three lakes and their respective lengths were recorded
a) Experimental unit is the length of two species of fish of lake trout.
b) Population is the set of all species in the lake
c) Sample is the twenty taken for testing
d) Response variable is the length of the fish
e) This is an observational study as already existing is recorded without any external control to change.
 
        
             
        
        
        
Answer:
If the task is performed in less than or equal to 130.8 seconds, then, the individuals qualify for advanced training.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 150 sec
Standard Deviation, σ = 15 sec
We are given that the distribution of time taken is a bell shaped distribution that is a normal distribution.
Formula:

We have to find the value of x such that the probability is 0.10
P(X < x)  
 
  
Calculation the value from standard normal z table, we have,  
 
  
Thus, if the task is performed in less than or equal to 130.8 seconds, then, the individuals qualify for advanced training.
 
        
             
        
        
        
Answer:
either the first or second but id go with the second one!
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
C. 1 / (a(a - 1))
Step-by-step explanation:
View Image
Just know that:
n! = n(n-1)!
    = n(n-1)(n-2)!
    = n(n-1)(n-2)(n-3)!
    = ...
 
        
                    
             
        
        
        
Answer:
You see the answer just character limit