The given data; 10,30,20
The mean will be (10+30+20)/3 = 20
Deviation from the mean will be; -10, 10, 0
Square of the deviations will be; 100, 100, 0
The sum of the square of the deviations = 200
The variance will therefore be; sum of the square of deviations from the mean divided by the N (3)
= 200/3 = 66.67
Thus; the variance = 66.67
Answer:
z=3t
Step-by-step explanation:
multiply it by 3
Where’s the rest of the question to help you answer this question ?
We must use PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction
Start with the given equation.
Start by solving the brackets ( ).
This means you need to solve the parentheses ( ) first.
Multiply .
Finish solving the brackets by subtracting.
Solve the exponent next.
Multiply .
Finally, add.
What I can’t see the pic?