Let \(x_i(1 \leq i \leq 10)\) be ten observations of a random variable \(X\). If \(\sum_{i=1}^{10}\left(x_i-p\right)=3\)…

Let \(x_i(1 \leq i \leq 10)\) be ten observations of a random variable \(X\). If \(\sum_{i=1}^{10}\left(x_i-p\right)=3\) and \(\sum_{i=1}^{10}\left(x_i-p\right)^2=9\) where \(p \neq 0\) \(p \in R\), then the standard deviation of these observations is

[JEE Main 2020, 3 Sep (Shift 2)]