Chapter 3, Problem 33E

To determine

To Explain: that the evidence that Prozac may be helpful in treating anorexia

Answer to Problem 33E

No evidence

Explanation of Solution

Given:

	Prozac	Placebo	Total
Healthy	35	32	67
Relapse	14	12	26
Total	49	44	93

Calculation:

Examine the evidence that treatment of Prozac would be more helpful in treating anorexia. Suppose the conditional distribution of percentages of relapse rates for Placebo and Prozac:

Relapse rate among the patient treated of Prozac:

  $\begin{array}{l}=\frac{\text{no}\text{.}\text{of}\text{relapsed patients that are treated by Prozac}}{\text{Total number people that are treated by Prozac}}\\ =\frac{14}{49}\times 100\\ =28.6\%\end{array}$

For the Placebo:

  $\begin{array}{l}=\frac{\text{no}\text{.}\text{of}\text{relapsed patients that are treated by Placebo}}{\text{Total number people that are treated by Placebo}}\\ =\frac{12}{44}\times 100\\ =27.3\%\end{array}$

The difference between the conditional Relapse rates is approximately negligible. Therefore it could be concluded that there is no evidence that Prozac may be support in treating anorexia.