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Suppose a drug company wants test whether a new drug that it has been developed, Phantol, is more effective than its competitor drug, Virol. The company defines "more effective" as Phantol will provide relief to a greater proportion of its users than Virol. Let's suppose that it is known that 70% of users of Virol get some relief of symptoms when they use that drug. Suppose that, of a sample of 300 patients, 75% state that Phantol provided them with some relief from symptoms. Construct a 95% confidence interval for the true proportion, mean, of Phantol users who got relief from using the drug. Do you feel comfortable concluding that Phantol is better than Vitol? Explain clearly.
A social scientist is about to send a questionnaire to a group of randomly selected people. If 30% of the population are younger than 25 and 17%
What do Anthropologists do? (all I need is a short answer for my Anthropology class.)
a. What are the H0 and H1? What is the test statistic? b. What is the sampling distribution of p?
A pair of dice is rolled once. Compute the probability that the sum is equal to each of the integers 2 through 12.
When sampling is for a population proportion from a population with actual proportion p = 0.5, using a sample of size n = 120, what is the standard deviation of our estimator P^?
A salesperson goes door-to-door in a residential area to demonstrate the use of a new household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) i..
1. Explain Type I and Type II errors. Use an example if needed. 2. Explain a one-tailed and two-tailed test. Use an example if needed.
What is the probability that a cereal would be high calorie given that its high fiber?(6)what is the probability that a cereal would be high calorie given that its low fiber?
the annual commissions earned by sales representatives of machine products inc. a manufacturer of light machinery
Find the probability that no defective transmissions are installed. Find the probability that exactly one defective transmission is installed.
What is the value of the stock of the company? Which part of this value is due to growth and how to explain the difference between the value
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
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