a- Provide a point and interval estimate (95% CI) for the interlaboratory standard deviation of mean zone diameters for each type of control strain, assuming each laboratory uses different media to perform the usceptibility tests.b- Answer Problem a assuming each laboratory uses a common medium to perform the susceptibility tests.c- Are there any advantages to using a common medium versus using different media for performing the susceptibility tests with regard to tandardization of results across laboratories? MicrobiologyA nine-laboratory cooperative study was performed toevaluate quality control for susceptibility tests with 30-µgnetilmicin disks [6]. Each laboratory tested three standardcontrol strains on a different lot of Mueller-Hinton agar, with150 tests performed per laboratory. For protocol control,each laboratory also performed 15 additional tests on eachof the control strains using the same lot of Mueller-Hintonagar across laboratories. The mean zone diameters for eachof the nine laboratories are given in Table 6.11. TABLE 6.11Mean zone diameters with 30-µg netilmicin disks tested in nine separate laboratoriesType of control strainE. coliS. aureusP. aeruginosaLaboratoryDifferent mediaCommon mediumDifferent mediaCommon mediumDifferent mediaCommon mediumA27.523.825.423.920.116.724.621.124.824.218.417.025.325.424.625.016.817.128.725.429.826.721.718.223.024.827.525.320.116.7F26.825.728.125.220.319.2G24.726.831.227.122.818.824.326.224.326.519.918.124.926.325.425.119.319.2

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Description: a- Provide a point and interval estimate (95% CI) for the interlaboratory standard deviation of mean zone diameters for each type of control strain, assuming each laboratory uses different media to perform the usceptibility tests.b- Answer Problem a

Given: mean zone diameters of different media and common medium of 3 different control strain.

Answered: - Provide a point and interval estimate…

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- Provide a point and interval estimate (95% CI) for the interlaboratory standard deviation of mean zone diameters for each type of control strain, assuming each laboratory uses different media to perform the usceptibility tests.
b- Answer Problem a assuming each laboratory uses a common medium to perform the susceptibility tests.
c- Are there any advantages to using a common medium versus using different media for performing the susceptibility tests with regard to tandardization of results across laboratories?

Microbiology
A nine-laboratory cooperative study was performed to
evaluate quality control for susceptibility tests with 30-µg
netilmicin disks [6]. Each laboratory tested three standard
control strains on a different lot of Mueller-Hinton agar, with
150 tests performed per laboratory. For protocol control,
each laboratory also performed 15 additional tests on each
of the control strains using the same lot of Mueller-Hinton
agar across laboratories. The mean zone diameters for each
of the nine laboratories are given in Table 6.11.

TABLE 6.11
Mean zone diameters with 30-µg netilmicin disks tested in nine separate laboratories
Type of control strain
E. coli
S. aureus
P. aeruginosa
Laboratory
Different media
Common medium
Different media
Common medium
Different media
Common medium
A
27.5
23.8
25.4
23.9
20.1
16.7
24.6
21.1
24.8
24.2
18.4
17.0
25.3
25.4
24.6
25.0
16.8
17.1
28.7
25.4
29.8
26.7
21.7
18.2
23.0
24.8
27.5
25.3
20.1
16.7
F
26.8
25.7
28.1
25.2
20.3
19.2
G
24.7
26.8
31.2
27.1
22.8
18.8
24.3
26.2
24.3
26.5
19.9
18.1
24.9
26.3
25.4
25.1
19.3
19.2

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