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In a medical study, 30% of the people recruited have disease X. After treatment Ais applied, only 10% of these people have disease X. Using percentage of people withdisease before the treatment as the reference value, compare the percentage of peoplewith disease X before and after treatment in absolute and relative terms?
Fish Caught in Spain According to the Eurostat Statistics Database, Spain accounts for 19% of the total fishes caught in the European Union (EU).
To gauge the size of the problem, the agency first picks 60 cars and finds 9 with faulty emissions systems. How many should be sampled for a full investigation?
Conduct a hypothesis test to determine if the population mean time on death row could likely be 15 years.
Let L equal the number of flips of a coin up to and including the first flip of heads. Devise a significance test for L at level α = 0.05 to test the hypothesis H that the coin is fair. What are the limitations of the test?
Ffind the mean, variance and standard deviation of binomial distribution? what valuses of the random variable X would you consider unusual?
Use the decision rule associated with part (a) and a range of selected assumed values for µ in constructing the power curve for the test.
Estimate the percentage of all American males who measure success primarily from their work. Use a 98% confidence interval.
the weather in bitsburg on any given day can be classified as sunny cloudy or partially cloudy. each day is also
We want to poll a sample of random people on whether they thought a candidate for a high government position deserves to be nominated.
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
Using the appropriate summary value, compare the location of the fastest ever driven response for males to the location for females. - Explain whether the spread is greater for one sex than the other or whether it is about the same.
If a random sample of 64 test scores is selected, what is the standard deviation of the sample mean? What is the probability that 64 randomly selected test scores will have a mean test score that is between 475 and 525?
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