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Find the standard deviation of x for the given points: {(-2,-1), (1,1), (3,2)}.Round your solution to three decinal places.

User Neouyghur
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1 Answer

2 votes

The x coordinates of the points are -2, 1 and 3

To find standard deviation, take the average or mean of thegiven numbers.


\begin{gathered} \text{Let n be the total count of numbers} \\ Mean,x_i=\frac{\text{Sum of numbers}}{n} \\ =(-2+1+3)/(3)=(2)/(3) \end{gathered}

Now subtract the mean from eah number and take their squares.


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User Mayur Vora
by
7.7k points
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