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A test to compare the taste of 6 iced-tea drinks is being arranged. Each participant will be given 3 of the drinks and asked to indicate which one tastes best.
a) How many different possibilities exist for the set of iced-tea drinks that a given participant will taste? (Show how you calculated your answer.)
b) If we consider the order in which the participant in part (a) tastes the 3 iced-tea drinks, how many possibilities exist? (Again, show all your work leading up to the answer.)
How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
If the correlation coefficient expresses the degree of a linear relationship, why is it appropriate to use the same formula with nonlinear relationships?
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
A process has a capability index of 0.40. This index is interpreted to mean that the process is:
a. Solve using the p value approch. b. Solve using the classical approch.
Why is it important that a sample be random and representative when conducting hypothesis testing?
Quality Progress, February 2005, reports on improvements in customer satisfaction and loyalty made by Bank of America. A key measure of customer satisfaction is the response (on a scale from 1 to 10) to the question
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
A random sample of 24 groups of adults has a mean daily lodging cost of $233 and a standard deviation of $12.50. Is there enough evidence to reject the claim at α= 0.10? Assume the population is normally distributed.
Product while 43 out of 80 females preferred it. Compute the test statistic and use technology to find the corresponding p-value based on this test.
What is the p-value and compute a 95% CI for the difference in means between the two groups?
The issue of how much should be spent to solve particular U.S. social problems is a complex matter, and people have diverse and conflicting ideas on these issues.
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