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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.
Compute the value of the test statistic for this hypothesis test. Using the p-value, at 95% confidence, test to determine whether the measures were effective in reducing the average price.
Suppose that the miles-per-gallon (mpg) rating of passenger cars is a normally distributed random variable with a mean and a standard deviation of 36.6 and 3.7 mpg, respectively. What is the probability that a randomly selected passenger car gets m..
suppose that a flaw in a certain computer chip installed in computers was discovered that could result in a wrong
Determine the expected shape of distribution of sample mean? Compute the likelihood of choosing a sample with mean of at least $112,000?
The 95% confidence interval for the mean of the sampling distribution of the mean is about:
We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.
Do the results differ from the standard two-sample t test with pooled variance? Are the p-values similar?
When sampling is done for the proportion of defective items in a large ship- ment, where the population proportion is 0.18 and the sample size is 200, what is the probability that the sample proportion will be at least 0.20?
in response to concerns about nutritional contents of fast foods mcdonalds has announced that it will use a new cooking
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
emily is interested in understanding if there is a relationship between whether or not people think the diversity
Compare these with the percentages specified by Tchebysheff's Theorem.
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