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Reconsider the port alcohol content data from Exercise 14.22. A normal probability plot casts some doubt on the assumption of population normality. However, a dotplot shows a reasonable amount of symmetry, and the mean, median, and 5% trimmed mean are 19.257, 19.200, and 19.209, respectively. Use the Wilcoxon test at significance level .01 to decide whether there is substantial evidence for concluding that true average content exceeds 18.5.
Exercise 14.22. The article "A Method for the Estimation of Alcohol in Fortified Wines Using Hydrometer Baumé and Refractometer Brix" (Amer. J. of Enol. and Vitic., 2006: 486-490) gave duplicate measurements on distilled alcohol content (%) for a sample of 35 port wines. Here are averages of those duplicate measurements Use the Ryan-Joiner test to decide at significance level .05 whether a normal distribution provides a plausible model for alcohol content.
What is a "Chi-Squared Test"? Provide a fully referenced explanation and provide a brief example on a Chi-squared test, fully referencing all sources of information.
Identify the sample mean of the paired differences between the two series of returns - Identify the standard error of the sample mean of the paired differences between the two series of returns.
Consider the following age data, which is the result of selecting a random sample of 20 United Airlines pilots.
the number of deaths due to firearms in the united states between 1968 and 1993 are given belowyearfirearm deaths
let x and y be two independent random variables where x has a bernoulli distribution with probability of success p 12
Frank Abagnale, the criminal played by Leonardo DiCaprio in the motion picture Catch Me If You Can, ended up in prison. After he left prison, however, he worked as a consultant to many companies on matters of fraud.
a water treatment plant needs to maintain the ph of the water in the reservoir at a certain level. to monitor this they
Two hundred seeds of such a cross are raised, and 142 turn out to be blue-flowering. Are the data consistent with the model?
According to recent surveys, 58% of households have a personal computers. If a random sample of 159 is selected, what is the probability that more than 81 but fewer than 105 have a personal computer?
The waiting times have a standard deviation of 5.7 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
the probability of a successful missile launch is 0.9. test launches are conducted until 3 successful launches are
If 1 man aged 18-24 is arbitrarily chosen, determine the probability that his serum cholesterol level is between 165 and 200.
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