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What is the Taguchi constant for a device that costs $400 to repair and a tolerance of plus or minus 0.5 mm with a mean squared deviation from the target of 0.3?
What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat. Part 2: What are the conditions for approximating with a norma
What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat.
Calculate the posterior probability that . (You can use the results in (b)). 2? ? Find the expected value of the posterior distribution.
Paul is conducting a study on the dollar value of orders placed with various suppliers. A sample of 10 orders showed amounts in thousands of dollars of 43.6, 61.3, 54, 70.7, 46, 56.3, 58.8, 73.7, 4
A Gallup Poll used telephone interviews to survey a sample of 1025 U.S. residents over the age of 18 regarding their use of credit cards. The poll reported that 76% of Americans said that they had a
In a survey of 9000 females. 6431 say they change their nail polish once a week. Construct 90% and 95% confidence intervals for the population proportion,. Interperet the results and compare the wid
A table gives the number of medical doctors per 100,000 people for each of the 50 states. It does not make sense to use the t procedures (or any other statistical procedures) to give a 95% confidenc
Your local newspaper contains a large number of advertisements for unfurnished one-bedroom apartments. You choose 10 at random and calculate that their mean monthly rent is $540 and that the standar
When sample data actually occur in pairs, an advantage of a paired t-test is that it tends to increase the power of a test (as compared to treating each sample independently).
Find the sample mean. Find the sample standard deviation. Construct a 90% confidence interval for the population mean u.
Just recently a study was conducted by Atlas Research to determine if there was a difference in humor content in coal and natural gas trade magazinze ads. In an indeoendent random sample of 400 coal
A regional survey of 100 homes sold recently revealed that the mean selling time was 94 days with a standard of 22 days. At a .1 signifigance level, can we conclude that the mean selling time has i
Discuss the various sampling methods we might use in determining which items to include in a sample?
What are the basic assumptions underlying multiple means test, and why do they matter?
Find the minimum sample size n needed to estimate u for the given values of c, s, and e
One-tail hypothesis, testing the claim that the true mean is 36 lb? Explain how the tail, upper or lower, is dictated by the point estimate. Two-tail hypothesis, testing the claim that the true mean
To test at the 5% level of significance, whether the true proportion of diabetics in the state of Florida between the ages of 18 and 44 years is 15%. It is shown that out of 1,260 diabetics in the s
However, if she gives a medium or easy test, there is a 0.5 probability that her next test will be of the same difficulty and a 0.25 probability for each of the other two levels of difficulty. Const
Use a normal curve to estimate the probability that the average age of the houses receiving the brochure is greater than 45 years.
To estimate the average age of a breast cancer patient, a random sample of 17 patients were selected from a large database. It was found that the point estimate is 65 years old with a sample standar
A warped coin has probability of 0.5 of landing Heads, probability of 0.3 of landing Tails, and probability 0.2 of landing on its Edge. It is flipped 5 times. What is the probability that more Heads
Describe what a Type I error would mean in the context of this problem.
The mathematics department is interested in observing the performance of their first-year undergraduate students. The performance in mathematics of all freshmen in college is compared with their pe
Build a 95% confidence interval for the difference in population menas, assuming that the population variances are equal. Please show work.