Paraquat is one of the most widely used herbicides and is highly toxic to In a study to assess the protective effects of a new agent A against paraquat, 200 rats were randomly assigned to three groups. The first group (treatment I) was administered paraquat; the second group (treatment II) was administered paraquat plus a low dose of agent A; the third group (treatment III) was administered paraquat plus a high dose of agent A. The number of rats that survived more than eight days for each group was recorded and are presented in Table 2 (attached). Suppose we want to answer the following question: (i) Test, at the 1% level of significance, whether agent A affects the survival rate of paraquat infected rats. Chi sqaure statistic summary also attached. a. What is the value of the observed test statistic associated with the test in question b. What is the p-value associated with the test in question (i)?
Paraquat is one of the most widely used herbicides and is highly toxic to In a study to assess the protective effects of a new agent A against paraquat, 200 rats were randomly assigned to three groups. The first group (treatment I) was administered paraquat; the second group (treatment II) was administered paraquat plus a low dose of agent A; the third group (treatment III) was administered paraquat plus a high dose of agent A. The number of rats that survived more than eight days for each group was recorded and are presented in Table 2 (attached). Suppose we want to answer the following question: (i) Test, at the 1% level of significance, whether agent A affects the survival rate of paraquat infected rats.
Chi sqaure statistic summary also attached.
a. What is the value of the observed test statistic associated with the test in question
b. What is the p-value associated with the test in question (i)?
c. At the 1% level of significance, does the p-value support the claim that agent A affects the survival rate of paraquat infected rats?
d. Is the requirement that the expected frequency in each cell is 5 or greater satisfied?
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