5) It is claimed that a new treatment for prolonging the lives of cancer patients is more effective than the standard one. Records of earlier research show the mean survival period to have been up to 4.3 years with the standard treatment. The new treatment is administered to a sample of 20 patients, and the durations of their survival are recorded. The sample mean is 4.6 years, and the standard deviation is 1.2 years. Can the standard treatment of up to 4.3 years be rejected, at the 1% level of significance? Is there enough evidence to support your claim? 6) Discuss methods of probability sampling and characteristics of good surveys