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The Institute for Public Opinion Research at Florida International University has conducted the FIU/ Florida Poll of about 1200 Floridians annually since 1988 to track opinions on a wide variety of issues. In 2006 the poll asked, "How concerned are you about the problem of global warming?" The possible responses were very concerned, somewhat concerned, not very concerned, and haven't heard about it. The poll reported percentages (44, 30, 21,6) in these categories.
(a) Identify the sample and the population.
(b) Are the percentages quoted statistics or parameters? Why?
Test the claim that the actual percentage is 53%. Use a 0.10 significance level.
let x and y be discrete variates with joint probability function fxyk1x1y for x123
Use the statistic of Exercise 12 to rework Exercise 70, and verify that the square of the value obtained for z equals the value obtained for χ2.
Comparing dexterity-test scores of workers on the day shift versus those on the night shift, the production manager of a large electronics plant finds that a sample of 37 workers from the day shift have an average score of 73.1, with a standard..
A psychologist is examining the influence of an older sibling in the development of social skills. A sample of 24 three year old children is obtained.
In a research study, what does statistically significant mean? How are decisions made on data based on significance? What do you do with data that is not significantly different?
Show that if X1 has a Poisson distribution with parameter A1, if X2 has a Poisson distribution with parameter ?2, and X1 and X2 are independent
Tread wear was found to be 80,000 miles with a standard deviation of 5,600 miles. What is the best estimate of the average tread life in miles for the entire population of these tires?
The sheet EZDescription describes the variables for this question. The data are on unemployment claims in Anderson (IN) from 1980 through November 1988. In 1984, an enterprise zone ("EZ") was located in Anderson (as well as other cities in Indiana..
What are the comparison of the different kinds of unified communication platforms, their features and functionality, based on the five criteria.
Develop a simulation model for this port. Compute such statistics as the average number of ships in port, the average number of days in port for a ship, and the percentage of idle time for each of the terminals
Find the estimated regression line.- Complete the ANOVA table (without the p value).- Find the coefficient of determination. Interpret this value.
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