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Question: Yellowstone National Park surveyed a random sample of 1526 winter visitors to the park. They asked each person whether he or she owned, rented, or had never used a snowmobile. Respondents were also asked whether they belonged to an environmental organization (like the Sierra Club). The two-way table summarizes the survey responses.
Snowmobiles (11.2) Do these data provide convincing evidence at the 5% significance level of an association between environmental club membership and snowmobile use for the population of visitors to Yellowstone National Park? Justify your answer.
Is this adage correct for baseball? Out of 2425 regular season games in 2002, the home team won 1314 of them. Does the home field advantage apply in baseball?
The data collected was for each car for each type of fuel. Performance was measured in miles per gallon. Perform an ANOVA test and state the results.
Concrete blocks are to be used in the foundations of several buildings. The specifications state that the minimum arithmetic mean compressive strength of a sample of blocks must be 1,000 pounds per square inch (psi).
A pensioner receives 2 (thousand dollars) at the beginning of each month. The amount of money he needs to spend during a month is independent of the amount he has and is equal to i with probability Pi , i = 1, 2, 3, 4, i=1 Pi = 1.
Referring to each company's on-line annual report, find the number of employees and net income in the most recent fiscal year for Coca-Cola, McDonald's, Dell Computer, and Compaq.
A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conjecture at a = 0.05 and how can this be graphed?
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
Margin of error for the predicted response. Refer to given Example. What is the 95% margin of error of when x = 9.0? Would you expect the 95% margin of error to be larger, smaller, or the same for x = 10.0? Explain.
Comparing the experimental and theoretical probabilities, can you say the die used in this experiment is a fair die? Why or why not?
More cereal. In Exercise we poured a large and a small bowl of cereal from a box. Suppose the amount of cereal that the manufacturer puts in the boxes.
suppose that you want to estimate the mean ph of rainfalls in an area that suffers from heavy pollution due to the
Test the null hypothesis that the coefficients of the three high school grade summaries are zero; that is, test H0: βHSM = βHSS = βHSE = 0.
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