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The Spanish patients, two men and two women, were elderly and very ill. All four had undergone routine dialysis at the Hospital de la Princesa. Soon after, they began sweating and vomiting, some of them in excruciating pain. They died within a few hours of receiving treatment.
Nothing seemed exceptional about the deaths of those old, sick patients on dialysis, even though four deaths had occurred in four days at the same place. Hospital officials noticed the manufacturers of the equipment involved, as dictated by protocol. But no one paid the incident much attention - until the following week, when people started dying in Valencia. " (Fast Company, 11/02)
QUESTION 1: At what point does the possibility that an event is more than coincidence become obvious? Consider this in terms of probability theory and statistical significance.
If garage is robbed, determine the probability doors were left open?
Determine a 95% confidence interval for the true mean weight of such boxes?
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
Compare these with the percentages specified by Tchebysheff's Theorem.
Use Excel and determine the number of each type of person that will be needed to complete the job within the allotted time and at minimum cost.
A study was conducted to determine whether there were significant differences between medical students admitted through special programs (such as affirmative action) and medical students admitted through regular criteria.
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
What is the difference between a point estimate and an interval estimate? How would you calculate a confidence interval with a z test?
Below are scores for 10 randomly selected students on each exam. 95% confidence interval for the mean scores on?
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
Let's suppose that we have 2 variables year and age.. I use STATA to make them into dummy variables as follows:
Reliable Furniture is a family business that has been selling to retail customers in the Chicago area for many years. They advertise extensively on radio and TV, emphasizing their low prices and easy credit terms.
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