The purpose of a study by Lugliè et al. (A-5) was to investigate the oral status of a group of patientsdiagnosed with thalassemia major (TM). One of the outcome measures was the decayed, missing, andfilled teeth index (DMFT). In a sample of 18 patients the mean DMFT index value was 10.3 with astandard deviation of 7.3. Is this sufficient evidence to allow us to conclude that the mean DMFTindex is greater than 9.0 in a population of similar subjects? Let a = .10.

If we want to compare the population mean with given value then z-test or t-test is used. If the…

Answered: The purpose of a study by Lugliè et al.…

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 study compared the long-term results of two treatments: a modified Burch procedure, and a sling procedure for stress incontinence with a low-pressure urethra. Thirty-six women took part in the study with 19 in the Burch treatment group and 17 in the sling procedure treatment group. One of the outcome measures at three months post-surgery was maximum urethral closure pressure (cm H2O). In the Burch group the mean and standard deviation were 16.4 and 8.2 cm, respectively. In the sling group, the mean and standard deviation were 39.8 and 23.0, respectively. Construct the 99% confidence interval for the difference in mean maximum urethral closure pressure for the two populations represented by these subjects. What is the critical value of the confidence interval for difference in means? what is the lower bound of a 99% confidence interval for the difference in means? (Burch-Sling) what is the upper bound of a 99% confidence interval for the difference in means? (Birch-Sling)
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