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Question: The U.S. Food and Drug Administration (FDA) is responsible for approving new drugs. Many consumer groups feel that the approval process is too easy and, therefore, too many drugs are approved that are later found to be unsafe. On the other hand, a number of industry lobbyists are pushing for a more lenient approval process so that pharmaceutical companies can get new drugs approved more easily and quickly (R. Sharpe, FDA Tries to Find Right Balance on Drug Approvals, The Wall Street Journal, April 20, 1999, p. A24). Consider a null hypothesis that a new, unapproved drug is unsafe and an alternative hypothesis that a new, unapproved drug is safe.
a. Explain the risks of committing a Type I or Type II error.
b. Which type of error are the consumer groups trying to avoid? Explain.
c. Which type of error are the industry lobbyists trying to avoid? Explain.
d. How would it be possible to lower the chances of both Type I and Type II errors?
assume that 2 out of every 1000 people have a particular disease. a test has been developed to detect this disease.
The mean television viewing time for teens is 3 hours per day. Assume the population mean is 3 and the population standard deviation is known to be 1.2 hours.
Is there a statistically significant relationship between gender and party preference?- Compute column percentages for the table to clarify the pattern of the relationship.
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
If used in an inverting amplifier configuration of gain-100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping?
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
List 1 profession example for each probability type: empirical probability and theoretical (classical) probability. Explain clearly how these probabilities are used.
Plot these data and comment on the nature of relationship between the two variables under consideration - find correlation between (X, Y).
What are the four possible outcomes for a test of hypothesis? Show these outcomes by writing a table. Briefly describe the Type I and Type II errors.
question laparoscopic surgery is a procedure for threading a small flexible tube within a patients body to explore or
Given that higher is better for this quality measurement, test the hypothesis that the quality of the second lot is lower than that of the first lot using a = 0.05. You may assume the two lots come from populations with the same variance.
of 1000 randomly selected cases of lung cancer 823 resulted in death. let p be the proportion of deaths among all lung
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