Mathematics, 27.03.2021 05:50, bbyjean9974
As a first step in developing a new drug to treat cancer in humans, an initial study of the drug is undertaken in rats. Three hundred rats with cancer are studied, and each is assigned to one of three treatments. One hundred rats are randomly assigned to a high dose of the new drug, 100 are randomly assigned to a low dose, and 100 are randomly assigned to a control group (no drug). After six months, each rat is examined and classified as having developed no tumors, one tumor, or two or more tumors. Which of the following would be an appropriate alternative hypothesis in this study for a chi-square test for homogeneity of tumor response across treatments?A. Ha :Ha : There is no difference in the distribution of tumor status across the three treatments. B. Ha :Ha : There is a difference in the distribution of tumor status across the three treatments. C. Ha :Ha : There is no association between tumor status and treatment. D. Ha :Ha : There is an association between tumor status and treatment. E. Ha :Ha : The proportion of rats with no tumors is the same for each treatment group.
Answers: 1
Mathematics, 21.06.2019 13:30, castiaulii16
Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6 m−6 6m
Answers: 3
Mathematics, 21.06.2019 21:00, mccdp55
Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]
Answers: 1
As a first step in developing a new drug to treat cancer in humans, an initial study of the drug is...
Chemistry, 06.01.2021 22:00