Which equation shows the process of standardizing? \( \begin{array}{l}E(X)=n p \\ Z=(X-\mu) / \sigma \\ f(x)=1-(\sigma / \mu) \\ E(X)=\mu\end{array} \)

1. The process of standardizing involves transforming a random variable \( X \) into a standard score \( Z \) by subtracting the mean \( \mu \) and dividing by the standard deviation \( \sigma \). 2. The equation that represents this process is: \[ Z = \frac{X - \mu}{\sigma} \] 3. Evaluating the other options: - \( E(X) = np \) represents the expected value of a binomial variable but does not show standardizing. - \( f(x) = 1 - \frac{\sigma}{\mu} \) is not related to standardizing. - \( E(X) = \mu \) simply reiterates the definition of the mean. Thus, the equation that shows the process of standardizing is: \[ Z = \frac{X - \mu}{\sigma} \]