2005
Mathematics
JAMB
Find the value of t if the standard deviation of 2t, 3t, 4t, 5t, and 6t is √2
A.
1
B.
2
C.
3
D.
4
Correct Answer: 1
Explanation
mean(x)=20t/5=4t. Standard deviation=√((10t2 )/5) √2=√((10t2 )/5) √2=√(2t2 ) 2=2t2 t2 =1. t=1
mean(x)=20t/5=4t. Standard deviation=√((10t2 )/5) √2=√((10t2 )/5) √2=√(2t2 ) 2=2t2 t2 =1. t=1THIS WEEK's
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