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Suppose that the probabilities are 0.60, 0.20, 0.10, and 0.10 that a state income tax return will be filled out correctly, that it will contain only errors favoring the taxpayer, that it will contain only errors favoring the state, or that it will contain both kinds of errors. What is the probability that among 12 such income tax returns randomly chosen for audit, 5 will be filled out correctly, 4 will contain only errors favoring the taxpayer, 2 will contain only errors favoring the state, and 1 will contain both kinds of errors?
Measure the convergence of annual provincial data relative to the national. I have data for per capita annual income for two provinces and I have to compare them with the per capita national data and evaluate if the provincial data converge toward..
refer to the following table for questions 1 2 and 3. show all work. just the answer without supporting work will
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
CHris Turlock owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city.
A fair coin is thrown n times. Show that the conditional probability of a head on any specified trial, given a total of k heads over the n trials, is k/n (k > 0).
Jasmine is an African American graduate student. She is conducting research on the effects that affirmative action programs have had on American corporations.
Explain clearly, in your own words, what is a Type I error in this context.
The number of children, x, belonging to each of eight families registering for swimming was 2, 2, 2, 4, 2, 1, 2, 2. Find the mean, x. (Give answer correct to 2 decimal places.)
Deciding on the number of observations to include in a sample is an important decision when planning a reasearch study. What information is required to make this descision
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%.
Suppose that an IQ test was given to a large group of persons, the scores are assumed to be from a normally distributed population, that mean = 100 and s (standard deviation) = 15.
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