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Question: Carnegie Mellon University maintains a site with many interesting data sets for use in the classroom. Some of these data sets are stored at https://stat.cmu.edu/DASL/allsubjects.html. Go to this web page, look under psychology, download the file called scents and read the file into an R variable called scent. The last six columns contain the time participants required to complete a pencil and paper maze when they were smelling a floral scent and when they were not. The columns headed by U.Trial.1, U.Trial.2, and U.Trial.3 are the times for no scent, which were taken taken on three different occasions. Compare scent and no scent data for occasion 1 using difference scores via the command trimci(scent[,7]-scent[,10],tr=0), so the mean of the difference scores is being used. Verify that the p-value is 0.597.
The average annual salary in Pennsylvania was $24,393. Assume that the salaries were normally distributed for this group of wage earners, and the standard deviation for this group was $4,362. Using this information, please respond to the following..
Given that 800 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading greater than 140 and less than or equal to 150?
70 of light aircraft that disappear while flying in a certain country are subsequently discovered. of the aircraft that
Discuss three important economic, social, and/or political changes in California that began during the Gold Rush period.
Additionally, I should note that this week our nation will be observing Constitution Day. For extra credit: discuss how the Constitution was undermined during this era. Find a few court cases that eventually defeated the fact that you include that..
the following table gives the probabilities gives the number of police officers who will call in sick daily for a large
Joe wants to sell his car. He receives one offer each month and must decide immediately whether to accept the offer. Once rejected, the offer is lost. The possible offers are $600, $800, and $1,000, made with probabilities 5/8, ¼ and 1/8 respectiv..
Past studies have indicated that the speeds at which both Nevada and California drivers drive have normal distributions.
To do statistical inference for these data, we think in terms of a model where p is a parameter that represents the probability that a tested bicycle rider is positive for alcohol. Find a 99% confidence interval for p.
They continue to do this until one of them runs out of money. If it is assumed that the successive ?ips of the coin are independent and each ?ip results in a head ith probability p, what is the probability that A winds up with all the money if A s..
Compute the mean and standard deviation of the scores and use these for the calculations below. Show your calculations on the back of his page.
Suppose a wildlife service wishes to estimate, with 99% confidence, the mean number of days of hunting per hunter for all licensed hunters in the state during a given season, with a bound on the error of estimation equal to 2 hunting days.
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