Answer:
Pythagorean triplet are the values of hypotenuse, base and perpendicular which tend to represent a right-angled triangle. Integral solutions to the Pythagorean Theorem, a2+b2=c2 are called Pythagorean triplet which contains three positive integers a,b,c where a<b<c.
Multiply both sides by three to get 2x=30
Then divide both sides by 2 to get x=15
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.
To calculate r²
The percentage of the variance is;




There is a correlation between height and speed of the serve
<h3>How to interpret the player statistics?</h3>
From the question, we understand that:
The taller a player, the faster the serve
This means that:
Height implies speed
In other words, there is correlation between the height and the speed of the service
Read more about correlation at:
brainly.com/question/4219149
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