A Researcher Wants to Determine If the Number of Minutes $\chi ^ { 2 }$

Multiple Choice

A researcher wants to determine if the number of minutes spent watching television per day is independent of gender. A random sample of 315 adults was selected and the results are shown below. Calculate the chi -square statistic $\chi ^ { 2 }$ to determine if there is enough evidence to conclude that the number of minutes spent watching television per day is related to gender. Use $\alpha = 0.05$ .
$\text { Gender }$$\quad$$\text { Minutes spent watching TV per day }$
$\begin{array} { l | c c c c } \hline & 0 - 30 & 30 - 60 & 60 - 90 & 90 - \text { over } \\\text { Male } & 25 & 35 & 75 & 45 \\\text { Female } & 30 & 45 & 45 & 15\end{array}$

A) 18.146
B) 19.874
C) 20.912
D) 21.231