Provide an Appropriate Response The Data in the Table Do Not Take into Account

Essay

Provide an appropriate response.
-Researchers conducted a study to determine which of two different treatments, A or B, is more effective in the treatment of atherosclerosis. The results of their experiment are given in the table. (a) Which treatment appears to be more effective? Why?
$\begin{array}{l|cc} & \text { Treatment A } & \text { Treatment B } \\\hline \text { Effective } & 420 & 435 \\\text { Not effective } & 130 & 140\end{array}$

The data in the table do not take into account the seriousness of the case. The data shown in the next table show the effectiveness of each treatment for both mild and advanced cases of atherosclerosis.



(b) Determine the proportion of mild cases of atherosclerosis that were effectively dealt with using treatment A. Determine the proportion of mild cases of atherosclerosis that were effectively dealt with using treatment B.
(c) Repeat part (b) for advanced cases of atherosclerosis to create a conditional distribution of effectiveness by treatment for each category of the disease.
(d) Write a short report detailing and explaining your findings.