If both the mean and the standard deviation of 50 \( \mathrm{P}^{\p...

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If both the mean and the standard deviation of 50
\( \mathrm{P}^{\prime \prime} \) observations \( x_{1}, x_{2}, \ldots \ldots ., x_{50} \) are equal to 16 , then

WV the mean of \( \left(x_{1}-4\right)^{2},\left(x_{2}-4\right)^{2}, \ldots,\left(x_{50}-4\right)^{2} \) is :
(1) \( \triangle 400 \)
(2) 380
(3) 525
(4) 480
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