The Accompanying Data Refers to Leaf Marks Found on White $\chi ^ { 2 }$

Essay

The accompanying data refers to leaf marks found on white clover samples selected from both long-grass areas and short-grass areas. Use a $\chi ^ { 2 }$ test at .01 level of significance to decide whether the true proportions of different marks are identical for the two types of regions. $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Type of mark }$
$$\begin{array}{l}\begin{array} { l | c c c c c | c } \hline & \text { L } & \text { LL } & \text { Y+YL } & \text { O } & \text { Others } & \text { Row Total } \\\hline \text { Long-grass areas } & 410 & 12 & 23 & 8 & 277 & 730 \\\text { Short-grass areas } & 515 & 6 & 16 & 13 & 220 & 770 \\\hline \text { Column Total } & 925 & 18 & 39 & 21 & 497 & \\\hline\end{array}\end{array}$$