Explain what is meant by a therapeutic index (TI)
What will be an ideal response?
Answer: The TI represents the difference in dose response curves for a therapeutic effect (e.g., reduction of appetite) versus a toxic effect (e.g., a dose required to induce seizures). A drug with a low TI value requires caution when prescribing.
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Which statement about the cause of sexual dysfunctions is accurate?
a. Recent studies indicate that biological and factors interact to cause the disorders. b. Masters and Johnson tended to deemphasize the importance of psychological factors. c. All primary forms of these disorders stem from a sociocultural basis. d. Recent studies show that biological factors sufficiently account for the disorders.
Many textbooks (though not this one) advocate testing the mean of a sample against a hypothesized population mean by using z even if the population standard deviation is not known, so long as the sample size exceeds 30. Those books recommend this because
a. they don't know any better. b. there are not tables for t for more than 30 degrees of freedom. c. the difference between t and z is small for that many cases. d. t and z are exactly the same for that many cases.