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Pareto charts. A large hospital was concerned about whether it was scheduling its operating rooms efficiently. Operating rooms lying idle may mean loss of potential revenue. Of particular interest was when and for how long the first operation of the day was performed. As a first step in understanding the use of its operating rooms, data were collected on what medical specialties were the first to use one of the rooms for an operation in the morning.5 Here is what the hospital found:
What percent of total operations do these 8 specialties account for? Make a Pareto chart of percent of all operations by specialty. Which specialties should the hospital study first when attempting to understand operating-room use?
Q7;
Special causes. Tayler participates in 10-kilometer races. She regularly runs 15 kilometers over the same course in training. Her time varies a bit from day to day but is generally stable. Give several examples of special causes that might raise Tayler's time on a particular day.
Under proposed plan, how long, on average, will patient stay in ER? On average, how long will Potential Admit stay in ER?
Variations and errors in the process of manufacturing alter the speed at which these processors can operate. The company tests each processor as it leaves the assembly line to determine its speed and sells it at an appropriate price
Validity is more critical to measurement than reliability. A valid measurement is reliable, but a reliable measurement may not be valid.
Test the hypothesis that the annual income of corporate trainers in areas of more then 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
The consumer advocate claim that 80% of cable televion subcribers are not satisfied with their cable service. In the attempt to justify this claim, a arbitarily chosen sample of cable subcribers will be polled in this issue.
State the main points of the Central Limit Theorem for a mean. B. Why is population shape of concern when estimating a mean? What does sample size have to do with it?
a consignment contains 100 items. if a random sample of 3 items from a consignment contains 1 or more faulty items then
probability based on binomial distribution.1 suppose that pe 0.76 pf 0.45 and pe and f 0.32. what is p e or f?2
Connect the successive points by line segments to help see the pattern. Are there systematic effects of time remaining after we regress consumption on price?
A psychologist studied self-esteem scores and found the data set to be normally distributed with a mean of 50 and a standard deviation of 6. A raw score of 47 is associated with what percentile?
Using a graph, compare and contrast the effect of a reduction in the marginal cost of a Cournot competitor when products are homogenous with a Bertrand competitor that produces a differen- tiated product.
where p is the binomial probability of returning a completed survey, and log is the natural logarithm. The multiple logistic regression output from fitting this model is given below.
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