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Question: Clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before? treatment, 14 subjects had a mean wake time of 104.0 min. After? treatment, the 14 subjects had a mean wake time of 79.1 min and a standard deviation of 21.1 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 90?% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 104.0 min before the? treatment? Does the drug appear to be? effective?
a popular flashlight that uses two d-size batteries was selected and several of the same models were purchased to test
A certain college gives aptitude tests in the sciences and the humanities to all entering freshmen. If X and Y are, respectively, the proportions of correct answers that a student gets on the tests in the two subjects, the joint probability distr..
Create a Venn Diagram using Microsoft Word that shows the differences and similarities between qualitative research designs and quantitative research designs. This is in regards to the educational setting.
What goes up must come down. The price of food has been going up for years. Therefore, it will surely come down soon.
If the oven gets hotter than 475 degrees F, the core is defective. What is the probability that the oven will cause a core to be defective?
Imagine that you have a portfolio of stocks. You want to compare the performance of your stocks to the market as a whole. You learn that the population mean,μ, of stock returns is 7%, and that the population standard deviation, σ, is 2%.
In the following enthymemes, determine whether the missing statement is a premise or a conclusion.- Higher life-forms could not have evolved through merely random processes, because no organized beings could have evolved that way.
The area under the standard normal curve between 0 and 2 is twice the area under area between 0 and 1.
Suppose that the incidence of MI is 0.005 per year among subjects who are actually take placebo and that aspirin prevents 20% of MIs
What are the endpoints of a 95 percent confidence interval for the proportion defective. (Round your answers to 3 decimal places).
What is the final temperature of the water? (C copper = 0.39kJ/kg degree celsius ; C iron = 0.46kJ/kg degree celsius)
At the end of 12 years, she stopped making payments to the account, but continued to invest her accumulated amount at 5% compounded annually for the next 11
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