Find the Value of The $\chi ^ { 2 }$ Test Statistic for a Hypothesis Test of Independence

Multiple Choice

Find the value of the $\chi ^ { 2 }$ test statistic for a hypothesis test of independence. Round your answer to 3 decimal places.
-A medical researcher is interested in determining if there is a relationship between adults over 50 who walk regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. $$\begin{array} { l | c c c } \text { Blood Pressure } & \text { Low } & \text { Moderate } & \text { High } \\\hline \text { Walkers } & 35 & 62 & 25 \\\text { Non-walkers } & 21 & 65 & 28\end{array}$$

A) 9.210
B) 0.176
C) 3.473
D) 3.743