Let \( x_{1}, x_{2}, \ldots, x_{n} \) be ' \( n \) ' observations. Let \( w_{i}=l x_{i}+k \) for....

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Let \( x_{1}, x_{2}, \ldots, x_{n} \) be ' \( n \) ' observations. Let \( w_{i}=l x_{i}+k \)
\( \mathrm{P} \)
for \( i=1,2, \ldots, n \) where ' \( k \) ' and ' \( l \) ' are constants. The
W
mean of \( x_{i}^{\prime} \) 's 48 and their standard deviation is 12 . Also, the mean of \( w_{i} \) 's 55 and standard deviation of \( w_{i} \) 's is 15 , Then
(1) \( l=1.25 \)
(2) \( l=-2.25 \)
(3) \( k=5 \)
(4) \( k=-5 \)



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