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1. A comparison of the proportion of frequent binge drinkers, revisited. Refer to Exercise 8.46. Redo the exercise in terms of the proportion of nonfrequent binge drinkers in each classi?cation. Explain how you could have obtained these results from the calculations you did in Exercise 8.46.
2. Effects of reducing air pollution. A study that evaluated the effects of a reduction in exposure to traf?c-related air pollutants compared respiratory symptoms of 283 residents of an area with congested streets with 165 residents in a similar area where the congestion was removed because a bypass was constructed. The symptoms of the residents of both areas were evaluated at baseline and again a year after the bypass was completed.24 For the residents of the congested streets, 17 reported that their symptoms of wheezing improved between baseline and one year later, while 35 of the residents of the bypass streets reported improvement.
(a) Find the two sample proportions.
(b) Report the difference in the proportions and the standard error of the difference.
(c) What are the appropriate null and alternative
write down the pdf for each of the following distributions then sketch the distributions on the axes provided be sure
Write the null and alternative hypotheses
For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
An analysis of 1,000 cellular phone calls made from company phones at the offices of Kant, Taekitini, Moore, LLC reveals that the length of these calls is normally distributed, with m = 240 seconds and s = 40 seconds.
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
the function fx 0 for xlt0 14x6 for 0ltxlt2 1 for xgt2 is the distribution function of a mixed random variable x.
His estimated regression equation was Crime = 428 + .050 Income. Which outcomes would be likely in a bivariate regression on 45 randomly chosen U.S. cities in 2005 with
q1 the average age of ceos is 56 years. assume the variable is normally distributed. if the standard deviation
Given the EOQ, what is the average inventory? What is the annual inventory holding cost and in minimizing cost, how many orders would be made each year? What would be the annual ordering cost
The following paper seeks to provide basic knowledge in some specific areas of statistical data analysis. While there are no hard and fast distinctions for analyzing statistical data, ensuring that you have a methodical approach is vital to an acc..
If the pairing is done at random, what is the probability that there are no white-black roommate pairs?
Determine the coefficient of determination, r2, and interpret its meaning. Find the standard error of the estimate. How useful do you think this regression model is for labor hours?
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