Answered: The correct conclusion is that we…

Name: A health professional obtains records for 33 patients who have undergo
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Description: A health professional obtains records for 33 patients who have undergone a certain surgical procedure and finds the average length of stay is 3.23 days with a standard deviation of 1.58 days. Using α=0.10 is there evidence to suggest the actual avera

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A health professional obtains records for 33 patients who have undergone a certain surgical procedure and finds the average length of stay is 3.23 days with a standard deviation of 1.58 days. Using α=0.10 is there evidence to suggest the actual average length of stay for this surgical procedure is 3 days?

The correct conclusion is that we Select an answer: (can, maybe can, cannot) conclude that the average length of stay of Select an answer: (all, sampled, randomly selected) surgeries of this type Select an answer: (is less than, is is different from, is more than) Select an answer: (3.23, 0.85, 3) days.

What level of concern do you have for the validity of your results?

Moderate - the original data is not normally distributed which is an assumptions violation
Low - our sample size is near 30, so while that's likely sufficient for X¯ to be approximately normally distributed, seeing that the original data isn't extremely skewed would make us feel more comfortable
Extreme - we should not use any part of what we've done to make a conclusion
None - our sample size is larger than 30 so there should be no problem with the conclusion

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