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As a bottler we want to know if the machine was underfilling. Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Test the hypothesis using a = 0.05. What can you conclude from all this?
The standard deviation of the sample was 6 people. Develop a 95 percent confidence interval for the population mean.
The proportion who died from coronary heart disease was .00669 for smokers and .00413 for nonsmokers. Describe the association of smoking each alung cancer.
Over a period of years, toothpaste has received a mean rating of 5.9, on a 7-point scale, for overall customer satisfaction with the product.
Cite an example of your experience with applying Six Sigma tools for Statistical significance in the workplace. If you do not have an actual example, suggest a situation or context in which the tools would provide valuable quality improvement help..
Tim has two more problems to solve on his test, but he doesn't know how long it will take to finish them. He assigns mutually irrelevant normal distributions to the times
A competitive school requires an applicant to have an IQ score in the top 10% of adults. What is the cutoff score?
The population of car speeds is approximately normally distributed. Determine a 90% confidence interval estimate for the speed of all cars.
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Determine standard deviation be if sample contained 100 students rather than 50? How large the sample is required to decrease standard deviation of percentage who say "Yes" from 7% to 3.5%?
Explore the descriptive statistics and draw some scatter plots. Does this meet the basic assumptions of regression?
What test can be performed to compare the percentage of participants who developed abnormal triglyceride levels between the vitamin A group and the trace group? Implement the test in Problem 10.68, and report a two tailed p value.
Test to determine whether the correlation in the population is zero, versus the alternate hypothesis that the correlation is greater than zero. Use the 0.05 significance level.
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