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Are the outcomes of hospital care different on weekends than weekdays? In a random sample of 500 patients who experienced severe medical complications after admission to acute care wards in three U.S. states from 1999 and 2001, 119 had been admitted on a weekend and 381 had been admitted on a weekday. This compares with a large population of people at risk for such complications in which 14.8% are admitted on weekends and 85.2% are admitted on weekdays (Bendavid et al. 2007). Test the hypotheses. State your conclusions clearly.
A number x is formed by choosing six digits in order, each being a 9 or a 1 and equally likely. Describe the sample space and count the number of sample points it contains.
For an arbitrary number, n, of bivariate observations, what are the smallest and largest values of K? Give examples of data sets where these extremes are achieved.
For married couples living in a certain suburb, the probability that the husband will vote on a bond referendum is 0.21, the probability that his wife will vote in the referendum is 0.28, and the probability that both the husband and wife will vot..
Timeline, in chronological order, indicate what you would identify as the ten most important events in western history before 1600 CE. Briefly explain your selection of each event. (You do not have to give specific dates, but you do need to give..
Industry standards recommend that 9 percent of new vehicles need warranty service in the first year. Determine the probability that none of these vehicles needs warranty service?
A random sample of male college baseball players and a random sample of male college soccer players were obtained independently and weighed.
(i) Make a two-way table of "environment temperature" against "hatched or not." (ii) The researchers anticipated that eggs would hatch less well at cooler temperatures. Do the data support that anticipation?
Students in a class were asked whether they preferred an in-class or a take-home final exam and were then categorized as to whether or not they had received.
Evaluate the factor effects. Find out which factors are significant in explaining yield.
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
Do you think the actual number in the " ≤ 140" range would equal the expected number in this range? If so, why? If not, why not?
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