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Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst? You are to perform a thorough and complete analysis of the data. Use alpha = .05 for all tests. The data is shown below and given in the Excel spreadsheet named Problem 1
Machine 1 Machine 2 Machine 3 Machine 4
6.4 8.7 11.1 9.97.8 7.4 10.3 12.85.3 9.4 9.7 12.17.4 10.1 10.3 10.88.4 9.2 9.2 11.37.3 9.8 8.8 11.5
Of those customers using extra unleaded or premium gas, 60% fill their tanks. What is the probability that the next customer fills the tank?
You're designing a survey to assess employee satisfaction. Provide a question that will produce: Develop five demographic questions to measure gender, age, years of experience, level of education, and ethnicity.
We would like to test if the proportion of respondents that support the health care bill is less than 50% (a) what kind of hypothesis test is appropriate?
Determine the special property of standard normal distribution, compared to other normal distributions?
Testing for population mean - What happens as you use different levels of significance? Different values of the standard deviation?
If she performs 15 demonstrations this week, what is the probability of her being satisfactory? What is the probability of between 4 and 8 (inclusive) orders?
Using sample, determine a 98% confidence interval for mean weight of whole daily output.
If we repeated this procedure many, many times, only 5 percent of the 95 percent confidence intervals would fail to include the mean Math SAT score of the population of all students at this college.
Use the method of least squares to model the relationship between x and y.
Determine the mean annual amount spent on household consumption per family with a sample of 100 families, an average amount of $8,000 spent, and if the population standard deviation is $500,
Fitting of multiple linear regression equation - Give a list of the model assumptions for a regression model.
Students need a score of 60 points to pass the exam. What is the probability that a randomly selected student will pas the exam? (P(X ≥ 60))
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