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A report in the Journal of the American Medical Association found that patients who spend more than 48 hours in an intensive-care unit of a hospital increase their risk of developing dangerous blood clots. A random survey is taken of 275 people who spent more than 48 hours in an intensive- care unit found 82 developed dangerous blood clots. Determine a 90% confidence interval of the true proportion of patients that developed dangerous blood clots.
The local zoo would like to institute a cheetah breeding program. In order to do so, their head zookeeper decides to look at a sample of 15 recent cheetah
What is meant by illusionary correlations? Why is it so difficult for individuals to disprove their beliefs in correlations that are actually false?
Tobias leaned the bolts of fabric on the wall behind the counter and an employee accidently spilled his drink on them. Will Tobias be liable for the damage?
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. An analysis decides to remove records that have missing values. About how many records would you expect would be remov..
suppose that it is known that the number of items produced at a factory per week is a random variable x with mean 50. a
according to the census bureau 3.04 people reside in the typical american household. a sample of 19 households in
If in fact each lot has a mean length of 3 meters, what percentage of the lots received by the manufacturer will be returned to the vendor (i.e., the supplier)?
Construct a 90% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming ( , )
A Nissan Motor Corporation advertisement read, "The average man's I.Q. is 107. The average brown trout's I.Q. is 4. So why can't man catch brown trout?
A researcher selected a sample of 50 residents from each of 3 different cities to determine if they were willing to participate in a medical experiment. which of the following assumptions is NOT made for the F test for comparing 3 or more means?
Is the distribution of housing prices in Topanga symmetric, right skewed, or left skewed? Hint: Sketch the distribution.
An educational researcher wants to know if the whole-language approach to teaching reading differs in effectiveness from more traditional approaches.
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