pan class="sd">    cov_y_c: float</span>
<span class="sd">        The covariance of y and c.</span>
<span class="sd">    y_ratio_yhat: float</span>
<span class="sd">        The weight of y in yhat.</span>
<span class="sd">    c_ratio_yhat: float</span>
<span class="sd">        The weight of c in yhat. Set it to zero for H0.</span>
<span class="sd">    n: int</span>
<span class="sd">        Number of observations.</span>
<span class="sd">    random_state: int</span>
<span class="sd">        Numpy random stat