pub fn variance_concentration_from_mean(
concentration_record: &ArrayView2<'_, f64>,
mean_concentration: &ArrayView1<'_, f64>,
full_volume: &ArrayView2<'_, f64>,
) -> Array1<f64>
pub fn variance_concentration_from_mean(
concentration_record: &ArrayView2<'_, f64>,
mean_concentration: &ArrayView1<'_, f64>,
full_volume: &ArrayView2<'_, f64>,
) -> Array1<f64>