2006
Mathematics
67ca00ce0c643c71d77dee1f
Find the variance of 2x, 2x-1 and 2x+1
A.
2/3
B.
2
C.
√(2/3)
D.
1
Correct Answer: 2/3
Explanation
∑x=6x∑(x-¯x )2 =2¯x=(∑x)/n=6x/3=2xVariance=(∑(x-¯x )2 )/n=2/3
∑x=6x∑(x-¯x )2 =2¯x=(∑x)/n=6x/3=2xVariance=(∑(x-¯x )2 )/n=2/3THIS WEEK's
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