Find the value of t if the standard deviation o... - JAMB Mathematics 2005 Question
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 option: a
\(mean(x) = \frac{20t}{5} = 4t\standard\hspace{1mm}deviation=\sqrt{\frac{10t^2}{5}}\\sqrt{2}=\sqrt{\frac{10t^2}{5}}\\sqrt{2}=\sqrt{2t^2}\2 = 2t^2\t^2=1\t=1\)
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