Final answer:
Based on the information provided, the incidence rate of PWS could be similar to the example given for another disease, where 1 in 200 women are affected. However, this number is a general estimate and actual incidence rates can vary.
Step-by-step explanation:
Prader-Willi Syndrome (PWS) is a rare condition prevalent in a certain number of individuals. While historical statistics vary, to provide a calculated estimate, we can use the example provided by the South Carolina Department of Mental Health, which states that for every 200 U.S. women, there is on average one who suffers from a particular disease. Extending this statistic to a sample of 600, it is expected that approximately three women might be affected by the disease. If we assume that the disease mentioned is PWS, then the incidence rate could be estimated as 1 in 200 for women based on this example. However, the incidence of PWS might differ and often is reported as varying across the general population, not limited to a specific gender.