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A medical team wants to evaluate the effectiveness of a new drug that has been proposed for people with high intraocular pressure (IOP). Prior to running a full-scale clinical trial of the drug, a pilot test was run using 10 patients with high IOP values. The n =10 patients had a mean decrease in IOP of = 15.2 mm Hg with a standard deviation of the 10 IOPs equal to s = 9.8 mm Hg after 15 weeks of using the drug. Determine the appropriate sample size for an a α = .01 test to have at most a .10 probability of a failing to detect at least a 4 mm Hg decrease in the mean IOP.
A gallop poll that was based on telephone interviews conducted April 9-12, 2012, using a random sample of 1016 adults aged 18 and older, living in all 50 US states and the District of Columbia, indicated that 29% of Americans spent more money in rece..
yashchin 1995 discusses a process for the chemical etching of silicon wafers used in integrated circuits. this process
a fast food center wishes to estimate the proportion of people in its city that will buy its products. suppose the true
when performing an f-test if the means differ significantly the between-group variance will be much larger than
What are examples of variables that follow a binomial probability distribution? What are examples of variables that follow a Poisson distribution? When might you use a geometric probability?
Explain this result (including the underlying logic of the computations) to a person who understands hypothesis testing involving a single sample and a known population, but knows nothing about t tests.
Find the critical value to determine if there is enough evidence to conclude that the number of minutes spent online per day is related to gender.
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the 0.10 level of significance, that the average trunk diame..
question according to a survey published by compsych corp. 54 of all workers read email while they are talking on the
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
What is the largest possible value of the covariance? Remember that r can be positive or negative and what is the covariance between X and Y
give an example of how one might use linear programming in the real
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