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About 75% of the students in a class score between 80 and 100 on a quiz. The other 25% of the students have scores spread out between 35 and 79. Characterize the shape of the distribution of quiz scores. Explain.
what is the final conclusion obtained when testing the claim that p gt 0.25 given that the p-value is 0.5555?p lt
How many units would have to be sampled to be 95% confident that you can estimate the fraction of defective parts within 2% (using the information from today's sample--that is using the result that )?
What is the possible utility of this model relative to that formulated in Exercise?- Explain what the coefficient of the variable associated with the banking industry means.
Test the null hypothesis that no difference exists between the proportions in population 1 and 2 needing major repairs against the alternative that a difference does exist. Use α = 0.10
A stationary chain fXng with transition probabilities pij is called reversible if there is a function m.x/ such that pij m.i/ D pji m.j/ for all i; j 2 S . Give a simple sufficient condition in terms of the function m that ensures that a reversible c..
in a study of the risk factors for invasive cervical cancer that was conducted in germany the following data were
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
Suppose that a random sample of 800 early replacement buyers yields a mean number of dealers visited of 1 = 3.3, and that a random sample of 500 late replacement buyers yields a mean number of dealers visited of 2= 4.5.
the article evaluation of criteria for setting speed limits on gravel roads measured speeds of vehicles on several
Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m2. Give a 90% confidence interval for the mean amount of muscle young men think they should add to be attractive to women. (..
a study looks at patients who were mechanically ventilated in the intensive care unit. the researchers found that of
Problems 3, 4, 6, 7, and 8must be done by hand and on the computer using statistical software (SPSS or JASP). Copy and insert the results into your problem set at the appropriate place.
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