Is cocaine deadlier than heroin? A study reported in the Journal of the American Medical Association found that rats with unlimited access to cocaine had poorer health, had more behavior disturbances, and died at a higher rate than did a corresponding group of rats given unlimited access to heroin. The death rates after 30 days on the study were as follows:
| %Dead at 30 Days |
Cocaine group | 90 |
Heroin group | 36 |
a. Suppose that 100 rats were used in each group. Conduct a test of H0: π1 – π2 ≤ 0 versus H0: π1 – π2 > 0. Give the p-value for your test.
b. What implications are there for human use of the two drugs?goodness-of-fit test should be viewed suspiciously. Don't automatically accept null hypothesis as fact given that H0 was not rejected.
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