Which ONE of the following options is the CORRECT formula for Chi-Square (\(\chi^2\)) test?
Given, \(O_1, O_2, \ldots, O_n\) are the observed values, \(E_1, E_2, \ldots, E_n\) are the corresponding expected values, \(\bar{O}\) is the mean of observed values, \(n\) is the number of observations, \(\mu\) is the mean of \(E_i, i = 1, \ldots, n\), \(\sigma_o\) is the standard deviation of observed values, and \(\sigma_E\) is the standard deviation of expected values \(E_i, i = 1, \ldots, n\).