5! Is the same as 5x4x3x2x1 and 4! Is the same as 4x3x2x1 because 4! Is in the denominator it cancels the 4x3x2x1 in the numerator and you are left with 5x(3!) witch is the same a 5x3x2x1. The answer=30
        
             
        
        
        
Answer:

t = 2.2450
d. 0.264
Step-by-step explanation:
The null hypothesis is:

Alternative hypothesis;

The pooled variance t-Test would have been determined if the population variance are the same.



The t-test statistics can be computed as:



t = 2.2450
Degree of freedom 
df = (8-1)+(8-1)
df = 7 + 7
 df = 14
At df = 14 and ∝ = 0.05;

Decision Rule: To reject the null hypothesis if the t-test is greater than the critical value.
Conclusion: We reject  and there is sufficient evidence to conclude that the test scores for contact address s less than Noncontact athletes.
 and there is sufficient evidence to conclude that the test scores for contact address s less than Noncontact athletes.
To calculate r²
The percentage of the variance is;




 
        
             
        
        
        
Answer:
3 and 4
Step-by-step explanation:
 
        
             
        
        
        
Answer:
7.5 miles
Step-by-step explanation:
2.5 times 3
hope this can help you :-P
 
        
                    
             
        
        
        
Answer:
Using long devision 
Step-by-step explanation:
I believe the answer is B