# Question: Researchers conducted a study to determine which of two treatments

Researchers conducted a study to determine which of two treatments, A or B, is more effective in the treatment of kidney stones. The results of their experiment are given in the table.

(a) Which treatment appears to be more effective? Why? The data in the table above do not take into account the size of the kidney stone. The data shown next indicate the effectiveness of each treatment for both large and small kidney stones.

(b) Determine the proportion of small kidney stones that were effectively dealt with using treatment A. Determine the proportion of small kidney stones that were effectively dealt

with using treatment B.

(c) Repeat part (b) for the large stones to create a conditional distribution of effectiveness by treatment for each stone size.

(d) Draw a bar graph of the conditional distribution from part (c).

(e) Write a short report detailing your ﬁndings.

(a) Which treatment appears to be more effective? Why? The data in the table above do not take into account the size of the kidney stone. The data shown next indicate the effectiveness of each treatment for both large and small kidney stones.

(b) Determine the proportion of small kidney stones that were effectively dealt with using treatment A. Determine the proportion of small kidney stones that were effectively dealt

with using treatment B.

(c) Repeat part (b) for the large stones to create a conditional distribution of effectiveness by treatment for each stone size.

(d) Draw a bar graph of the conditional distribution from part (c).

(e) Write a short report detailing your ﬁndings.

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