The Standard deviation could only be zero if all the data points in your set are equal. If all data points are equal, there is no deviation.
Answer:
52 miles per hour
Step-by-step explanation:
247/4.75 = 52
Well what’s question 2 so I can figure it out
Answer:
Step-by-step explanation:
Data given in the question:

Task is to rationalize the expression.
Solution:-
To rationalize the denominator we have to multiply the numerator and denominator by the root of the denominator.

root of
is 
Multiplying the Nr and Dr by the root.


Add them up, divide by the amount of numbers you have.
2 + 6 + 9 + 7 = 24
24 / 4 = 6