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The post anesthesia care area (recovery room) at St. Luke's Hospital in Maumee, Ohio was recently enlarged. The hope was that with the enlargement the mean number of patients per day would be more than 25. A random sample of 15 days revealed the following numbers of patients.
25 27 25 26 25 28 28 27 24 26 25 29 25 27 24
At the .01 significance level, can we conclude that the mean number of patients per day is more than 25? Estimate the p-value and interpret it.
Do any of the selected samples seem to be out of the control limits? Describe.
Most of the time managers will have initial (or prior) knowledge of the probabilities that an event or outcome will result. When new information is obtained, initial probability projections can be revised and improved. What statistical techniques ..
A major benefit of two-way ANOVA over several one-way ANOVAs, If an F test for interaction is significant.
Testing for two Proportions - Is the difference between the averages statistically significant?
A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages. On each page
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
Computing the probability values using normal distribution - what proportion have SAT scores greater than 550?
Can the formal hypothesis testing approach be used for non parametric tests? How are parametric and nonparametric statistics different?
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
What is the distribution of sample means.
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
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