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Suppose that you are a researcher testing a new drug that might cure AIDS. In making a decision about whether to recommend this drug for use, you test the null hypothesis that the drug is not effective in curing AIDS. Describe the Type I and Type II errors with your study. What are the ramifications of making these errors (from a clinical perspective)?
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
A random variable X with PDF f(x)=2xe^-x^2, where x>0. I need to draw a random sample of size 1000 from this distribution in Stata and obtain the sample mean and st. dev.
They decide to sample some fast-food restaurants currently operating to estimate the monthly cost of electricity. They want to be 90% confident of their results and want the error of the interval estimate to be no more than $100.
1. let x be normally distributed random variable with mu 100 and sigma 10. find the probability that x is between 75
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
the rapid test is used to determine whether someone has hiv the virus that causes aids. the false-positive and
1.a researcher wanted to know if the content of television programs has an impact on viewers recall of ad content. he
1 an engineer is going to redesign an ejection seat for an airplane. the seat was designed by pilots weighing between
How is data screening related to the assumptions of the statistic you will choose to analyze your data?
question your job as marketing manager of a large chain is to watch the overall market situation in many districts. the
Can you conclude that every one-bedroom apartment costs less than every two-bedroom apartment? Which is more useful to someone planning to rent an apartment, the confidence interval or the significance test?
a pair of dice is rolled 270 times. using the normal curve approximation what is the probability that a total of 7
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