Glaucoma is a leading cause of blindness in the United States, N. Ehlers measured the difference in corneal thickness (in microns) between the two eyes of eight patients. Each patient had one eye that had glaucoma and one eye that was normal. The difference was measured as the corneal thickness of normal eye – corneal thickness of eye with Glaucoma. Corneal thickness is important because it can mask an accurate reading of eye pressure. Use ? = .05. Q)Conduct a hypothesis test to determine if there is sufficient evidence to conclude that corneal thickness is different in normal eyes compared to eyes with glaucoma? Write up your results using the 8 steps. tatistics ViewersformĮnsertFormatAnalyzeGraphsUtilitiesExtensionsWindowHelpPaired Samples StatisticsMeanStd. DeviationStd. Error MeanPair 1Patient4.5082.449.866Corneal thickness4.0000810.743773.79850difference (normal-glaucoma) micronsPaired Samples CorrelationsSignificanceCorrelation One-Sided p Two-Sided pPair 1Patient & Corneal8.206312.624thickness difference(normal-glaucoma)micronsPaired Samples TestPaired DifferencesSignificance95% Confidence Interval of theDifferenceMeanStd. DeviationStd. Error MeanLowerUpperdfOne-Sided p Two-Sided pPair 1Patient - Corneal thickness.5000010.515293.71772-8.291019.29101.1347.448.897difference (normal-glaucoma) micronsPaired Samples Effect Sizes95% Confidence IntervalStandardizer Point EstimateLowerUpperPair 1Patient - Corneal thicknessCohen's d7.792.064-.632.756difference (normal-glaucoma) micronsHedges' correction8.773.057-.561.671a. The denominator used in estimating the effect sizes.Cohen's d uses the square root of the average variance of measures.Hedges' correction uses the square root of the average variance of measures, plus a correction factor. : Corneal_DiffVisible: 2 of 2 VariablesPatientCorneal Diffvarvarvarvar11-4.002.00312.004418.005-4.0066-12.0076.008816.009101112131415Data View Variable ViewCase... IBM SPSS Statistics Processor is readyUnicode:ON Classic3.7.2.

Given: μd= difference between corneal thickness of normal eye – corneal thickness of eye with…

Answered: Glaucoma is a leading cause of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Question

Glaucoma is a leading cause of blindness in the United States, N. Ehlers measured
the difference in corneal thickness (in microns) between the two eyes of eight patients.
Each patient had one eye that had glaucoma and one eye that was normal. The
difference was measured as the corneal thickness of normal eye – corneal thickness
of eye with Glaucoma. Corneal thickness is important because it can mask an
accurate reading of eye pressure.
Use ? = .05.

Q)Conduct a hypothesis test to determine if there is sufficient evidence to
conclude that corneal thickness is different in normal eyes compared to eyes
with glaucoma? Write up your results using the 8 steps.

tatistics Viewer
sform
Įnsert
Format
Analyze
Graphs
Utilities
Extensions
Window
Help
Paired Samples Statistics
Mean
Std. Deviation
Std. Error Mean
Pair 1
Patient
4.50
8
2.449
.866
Corneal thickness
4.0000
8
10.74377
3.79850
difference (normal-
glaucoma) microns
Paired Samples Correlations
Significance
Correlation One-Sided p Two-Sided p
Pair 1
Patient & Corneal
8
.206
312
.624
thickness difference
(normal-glaucoma)
microns
Paired Samples Test
Paired Differences
Significance
95% Confidence Interval of the
Difference
Mean
Std. Deviation
Std. Error Mean
Lower
Upper
df
One-Sided p Two-Sided p
Pair 1
Patient - Corneal thickness
.50000
10.51529
3.71772
-8.29101
9.29101
.134
7
.448
.897
difference (normal-
glaucoma) microns
Paired Samples Effect Sizes
95% Confidence Interval
Standardizer Point Estimate
Lower
Upper
Pair 1
Patient - Corneal thickness
Cohen's d
7.792
.064
-.632
.756
difference (normal-
glaucoma) microns
Hedges' correction
8.773
.057
-.561
.671
a. The denominator used in estimating the effect sizes.
Cohen's d uses the square root of the average variance of measures.
Hedges' correction uses the square root of the average variance of measures, plus a correction factor.

: Corneal_Diff
Visible: 2 of 2 Variables
Patient
Corneal Diff
var
var
var
var
1
1
-4.00
2
.00
3
12.00
4
4
18.00
5
-4.00
6
6
-12.00
7
6.00
8
8
16.00
9
10
11
12
13
14
15
Data View Variable View
Case... IBM SPSS Statistics Processor is ready
Unicode:ON Classic
3.
7.
2.

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Follow-up Questions

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Follow-up Question

Write a report summarizing your findings. When writing the
report consider that medical staff estimate that a difference of 4.5 microns
or more could impact on their ability to interpret eye pressure correctly.

Solution