Compute the 5 year survival rate S(5) with the help of K-M method. Years after Alive at Died during Lost to Withdrawn Diagnosis beginning of interval interval alive during interval follow-up 0-1 126 47 4. 15 1-2 60 5 11 2-3 38 15 3-4 21 2 2 7 4-5 10 6.
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- The germination rate of seeds is defined as the proportion of seeds that, when properly planted and watered, sprout and grow. A certain variety of grass seed usually has a germination rate of 0.80, and a company wants to see if spraying the seeds with a chemical that is known to change germination rates in other species will change the germination rate of this grass species. (a) Suppose the company plans to spray a random sample of 400 seeds and conduct a two-sided test of 0: 0.8Hpusing = 0.05. They determine that the power of this test against the alternative 0.75pis 0.69. Interpret the power of this test.(b) Describe two ways the company can increase the power of the test. What is a disadvantage of each of these ways? (c) The company researchers spray 400 seeds with the chemical and 307 of the seeds germinate. This produces a 95% confidence interval for the proportion of seeds that germinate of (0.726, 0.809). Use this confidence interval to determine whether the test described in…A researcher designs an experiment using two drugs, she prepares 15 independent flasks of yeast growth medium and yeast cells. She adds tunicamycin (T) or caffeine (C) to 5 flasks each. Remaining 5 flasks get no drugs (ND). Doubling time of the yeast cells are measured in each flask, data is in the table. Test if mean doubling time is different than others in at least one growth condition (ND, T or C), using F-test and report an approximate p-value for the level of significance. What is the hypotheses and the assumptions of this test?A researcher designs an experiment using two drugs, she prepares 15 independent flasks of yeast growth medium and yeast cells. She adds tunicamycin (T) or caffeine (C) to 5 flasks each.Remaining 5 flasks get no drugs (ND). Doubling time of the yeast cells are measured in each flask,data is provided below: a. Test if mean doubling time is different than others in at least one growth condition (ND, T or C),using F-test and report an approximate p-value for the level of significance. What is the hypotheses and the assumptions of this test?b. Repeat the test using a non-parametric method. Please solve manually not using software program.
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