A preliminary study suggests a benefit from green tea for those at risk of prostate cancer. The

Question:

A preliminary study suggests a benefit from green tea for those at risk of prostate cancer. The study involved 60 men with PIN lesions, some of which turn into prostate cancer. Half the men, randomly determined, were given 600 mg a day of a green tea extract while the other half were given a placebo. The study was double-blind, and the results after one year are shown in Table 6.14. Does the sample provide evidence that taking green tea extract reduces the risk of developing prostate cancer?

Table 6.14

Treatment No Cancer Cancer 29 Green tea Placebo 21