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Some students think that a 90% confidence interval contains 90% of the data. Use the list of data given (the heights of women) and count how many of the data values lie within the confidence interval that you generated on that page. How many of the 100 data values lie within your confidence interval? What percent is this? Is this percent close to 90%?
In the library, locate two journal articles that use one of the nonparametric tests discussed in this chapter. Prepare a brief outline of the articles.
Let X1, ... , Xn depict a random sample drawn from the probability density function f (x; θ) = θxθ -1,0 x 1, θ > 0. Find the minimum variance bound for an unbiased estimator of θ .
it is known that the white shark grows to a mean length of 22 feet however one marine biologist believes that great
Based on the confidence interval, test the null hypothesis that Bush's approval rating was no better than the 27% level established by Richard Nixon during the Watergate scandal.
is the national crime rate really going down? some sociologists say yes they say that the reason for the decline in
Exercises 16.45 and 16.47 used the example from How It Works 15.2 on the relation between age and how much people study.
find the value of z that would be used to test the difference between the proportions given the following. use g - h.
Construct a frequency distribution for each of the generations. Use the communication categories (1) Gp Meeting, (2) Face-to-Face, (3) e-mail, and (4) Other. Calculate the probability that a randomly chosen member of the workforce prefers communica..
1. Travelers are asked how many hours they are willing to drive while on vacation in one day. A total of 86 travelers reported a mean of 11.55 hours with a standard deviation of 1.2 hours. Find the 99% confidence interval for the mean number of ho..
Using an appropriate test procedure, carry out a test of the hypothesis given in Part (b). Use a = .05 for this test.
If the number of heads turns out to equal one of your 11 numbers, you win a dollar. which 11 numbers should you pick, and what is your chance of winning? explain.
A log-normal distribution results (which gets its name from the fact that if the logarithm is taken, the distribution becomes normal). But why is that plausible?
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