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Two binomial population proportions are suspected to be approximately 0.3, but they are unknown precisely. Using these as initial estimates, it is desired to conduct a study to determine the difference between these two population proportions. Obtain a general expression for the sample size n1 = n2 = n required in order to determine the difference p1 - p2 to within ±ξ with (1 - α) × 100% con?dence. In the speci?c case where ξ = 0.02 and α = 0.05 what is n?
life expectancies for men and women were measured by country. it was found that the average male life expectancy was
hi i want a brief description of the r codes needed to implement the method1 bootstrap2 cross-validation3 subset
Use expected collision claim amount to find out the collision insurance premium that would permit the company to break even on collision portion of policy.
What is the probability that a random person has an IQ between 85 and 115? Find the 90th percentile of the IQ distribution.
Calculate the test statistic and the df - Write a conclusion, addressing the research question. Your conclusion should include an interpretation of the 95% confidence bound which is given in the above output
At the 5% level of significance, does this result support the conjecture?
a consumer interest group wishes to compare the effectiveness of three competing brands of medicine. they take a random
The participants in a television quiz show are picked from a large pool of applicants with approximately 60% men and 40% women. X is a random variable that gives the number of females chosen when ten participants are picked randomly.
In the following situations, decide whether you would use a personal interview, observation, mailed questionnaire or telephone interview. Give your reasons.
Consider the experiment of throwing an ideal die three times(all outcomes are equally likely). Let X and M denote the mean and the median respectively, of the three scores obtained.
Suppose that the incumbent has sufficient capacity such that at p = w she can produce the market demand. If the price postentry is w, would an entrant enter? Should the price postentry reflect w? Equal w?
How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain.
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