Function chi_statistics

ciphercore-base/src/random.rs:363–369

Computes chi squared statistics

(counters: &[u64], expected_count_per_element: u64)

// Computes chi squared statistics
pub fn chi_statistics(counters: &[u64], expected_count_per_element: u64) -> f64 {
    let mut chi_statistics = 0_f64;
    for c in counters {
        chi_statistics += (*c as f64 - expected_count_per_element as f64).powi(2);
    }
    chi_statistics / expected_count_per_element as f64
}

#[cfg(test)]
mod tests {