Paraquat is one of the most widely used herbicides and is highly toxic to animals. 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 1% level of significance, whether agent A affects the survival rate of paraquat infected rats.
Paraquat is one of the most widely used herbicides and is highly toxic to animals. 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
1% level of significance, whether agent A affects the survival rate of paraquat infected rats.
a)For the test , how many degrees of freedom does the distribution of the test statistic have?
(c) What is the value of the observed test statistic associated with the test ?
(d) What is the p-value associated with the test ?
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