Compare the Obtained and Critical Values for the Test Results

Compare the obtained and critical values for the test results below and determine if the null hypothesis can be rejected.
$\begin{array}{|l|l|l|c|}\hline & {\begin{array}{c}\text { Obtained } \\\text { Value }\end{array}} & {\begin{array}{c}\text { Critical } \\\text { Value }\end{array}} & \begin{array}{c}\text { Reject Ho } \\\text { Yes/No }\end{array} \\\hline \text { a. } & r_{s_{a b t}}=.8391 & r_{s_{\text {crit }}}=. .7273 & \\\hline \text { b. } & T_{\text {bbt }}=10 & T_{\text {crit }}=12 & \\\hline \text { c. } & \mathcal{L}_{\text {obt }}=10.12 & \chi_{\text {crit }}^{2}=14.067 & \\\hline \text { d. } & U_{\text {obt }}=8 & U_{\text {crit }}=15 & \\\hline\end{array}$