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Question: A local hospital is trying to assess its performance vis-à-vis national performance. The Department of Health has recently indicated that, nationally, for a particular hospital-based treatment the mean length of stay of patients in hospital was 8.6 days. The local hospital has checked the records of 150 of its patients who have recently been discharged from hospital having received this treatment and found the mean LOS was 7.5 days, standard deviation 1.1 days. The hospital manager is keen to contact the local media to publicise that the hospital is performing better than the national average in this treatment area. Would you recommend her to do this?
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
Is a new treatment for ACL knee surgery in college athletes better than the standard treatment with respect to a test of how well the knee works six months after the surgery?
peter applied to an accounting firm and a consulting firm. he knows that 30 of similarly qualified applicants receive
Carry out the Wilcoxon rank sum test. State hypotheses and give the rank sum W for high-progress readers, its P-value, and your conclusion. Do the t and Wilcoxon tests lead you to different conclusions?
To estimate p, we use the proportion p-hat in the sample who answer "Yes." Justify the use of a normal approximation and find the following probabilities.
MA3110 - Module Correlation and Regression - Is there sufficient evidence to conclude that there is a linear correlation between the proportion of wins and the above difference?
(a) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit. (b) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, w..
The Problem Solving Inventory (PSI) has a normal distribution with mean = 90 and standard deviation = 15. A researcher suspects that the mean for female students is higher than 90.
from a random sample of 70 high school seniors the mean and standard deviation of the verbal scores in the sat are
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
Pattern that most accurately represents mean, median and mode is?
Describe how the study could be done using a matched pair design.- Explain why a matched-pair design is a good idea in this situation.
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