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Question: Revealing information. 886 randomly sampled teens were asked which of several personal items of information they thought it okay to share with someone they had just met. 44% said it was okay to share their e-mail addresses, but only 29% said they would give out their cell phone numbers. A researcher claims that a two-proportion -test could tell whether there was a real difference among all teens. Explain why that test would not be appropriate for these data.
This problem is based on the single regression you did in the previous chapter. We just added another variable called "freedom index" to turn it.
At the .01 significance level, can we conclude that a larger proportion of men were driving on the New Jersey Turnpike than the national statistics indicate?
the applet below simulates sampling from an urn containing n balls. the total number of balls in the urn the number of
The company further estimates that the probability that the legislation will pass is 0.75. If the company should find that the relevant legislation just passed, what is the probability that authorization to visit the port will be granted?
the grade point averages gpa for 12 randomly selected college students are shown below. assume the population is
For a one tailed hypothesis test (upper tail), the p-value is computed to be 0.034. If the test is being conducted at a 95% confidence, the null hypothesis.
What is the centered moving average that would correspond to Quarter 2 in 2006? If we exponentially smooth the data with the a smoothing constant of 0.1, the smoothed value for Quarter 3 in 2004 would be?
Consider a binomial distribution with fifteen trials and probability of success on a single trial p = 0.25. Create a worksheet showing values of r and corresponding binomial probabilities. Generate a bar graph of the distribution
in a cheese factory 5.0 kg blocs of cheese are cut manually. for a large number of blocks the standard deviation of the
How does the percentage likelihood of a successful negotiation change over the course of time? Use the statistical data to inform the plan and the course of action the department will take in this hostage situation.
Describe a problem in your workplace (or another workplace) that can be solved by each one of these methods and set up the solution for each
From Jackson (2016): Chapter Exercises #1, 2, and 4 only for Ch. 9 (p. 252-253). What is the purpose of conducting an experiment? How does an experimental design accomplish its purpose? In an educational study, what are the advantages and disadvantag..
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