Could Cancer Cells Be Selectively Targeted by Using Antibodies Recognizing $$p \text { Treatment } = p \text { Control }$$

Multiple Choice

Could cancer cells be selectively targeted by using antibodies recognizing a tumor-specific protein marker? Researchers grafted human cancerous cells onto 20 healthy adult mice and then randomly assigned 10 of these mice to be treated with tumor-specific antibodies. They found that only 1 of the 10 mice treated with antibodies developed metastases (i.e., new cancer growths) , whereas all 10 of the 10 mice in the control group developed metastases. What is the margin of error for a 95% plus four confidence interval for $$p \text { Treatment } = p \text { Control }$$ ?

A) 0.186
B) 0.263
C) 0.282
D) 0.500