A clinical trial study explored patient survival in a cancer drug… A clinical trial study explored patient survival in a cancer drug trial
A clinical trial study explored patient survival in a cancer drug… A clinical trial study explored patient survival in a cancer drug trial. The first group of patients was given the placebo (drug ==1), the second given drug 2 and the third group given drug 3. Due to the small sample size, the researchers decided to combine the second and third group into one group. The study recorded the study time (months to death or end of trial), whether the patient died (1=died), the drug (placebo=1, drug 2 = 2 and drug 3=3), and patient age in years. One of the aims is to see if the new drugs (combined drug 2 and 3) had a different study time than the placebo (drug 1). These data are in the file assignment 2 cancer patient survival.csv or assignment 2 cancer patient survival.dta. The samples have been selected so that the data are statistically independent and are assumed to follow an approximately normal distribution. studytime died drug age1 1 1 611 1 1 652 1 1 593 1 1 524 1 1 564 1 1 675 1 1 635 1 1 588 1 1 568 0 1 588 1 1 528 1 1 4911 1 1 5011 1 1 5512 1 1 4912 1 1 6215 1 1 5117 1 1 4922 1 1 5723 1 1 526 1 2 676 0 2 657 1 2 589 0 2 5610 0 2 4911 0 2 6113 1 2 6215 0 2 5016 1 2 6719 0 2 5020 0 2 5522 1 2 5823 1 2 4732 0 2 526 1 3 5510 1 3 5417 0 3 6019 0 3 4924 1 3 5825 0 3 5025 1 3 5528 1 3 5728 0 3 4832 0 3 5633 1 3 6034 0 3 6235 0 3 4839 0 3 528. Test the hypothesis that the mean study time for drug 1 is different to the mean study time for the combined drugs, drug_combined (drug 2 and 3). As part of your answer, you should:a. Generate a new variable drug_combined = 0 for placebo group and 1 for drug 2 or drug 3. What proportion of the patients were given drug 2 or 3 (2 decimals)? (2 marks)b. Specify the null and alternative hypotheses. (1 mark)c. Carry out a test of the hypothesis, where appropriate, report stats to 2 decimals (4 marks).d. Correctly report and interpret the results of the hypothesis test. (2 marks)(Total 9 marks) Science Health Science HSH 746 Share QuestionEmailCopy link
