Page 32 - THE 14th GRADUATE INTEGRITY : GI14

After using mentioned value, the resulting sample size(n) is equal to 85 while total n in this study is 103.

Almost researchers typically use Cohen’s guidelines of Pearson’s r = .10, .30, and .50, and Cohen’s
d = 0.20, 0.50, and 0.80 to interpret observed effect sizes as small, medium, or large, respectively. However,
these guidelines were not based on quantitative estimates and are only recommended if field-specific

estimates are unknown. This study investigated the distribution of effect sizes in both individual differences
[15]
research and group differences research to provide estimates of effect sizes in the field.
Posterior - Anterior (PA) CXR. This is the most common and preferred type of chest X-Ray. Posterior
- anterior refers to the direction of the X-Ray beam travel.; i e. X-Ray beams hit the posterior part of the

chest before the anterior part. To obtain the image, the patient is asked to stand with their chest against
the film, to hold their arms up or to the sides and roll their shoulders forward. The X-ray technician may
then ask the patient to take few deep breaths and hold it for a couple of seconds. This techniques of

holding the breath generally helps to get a clear picture of the heart and lungs on the image.
Statistical Analysis
The mean, standard deviation and median were evaluated for the distribution of the quantitative
value. Correlation coefficient was used to evaluate correlation between each parameter with the threshold

of higher than 0.25 of being significant. T-test were used to evaluate relationship between experimental
and controlled group with 95% confidence interval. The analysis determined the statistically significant
variables (p<0.05) to model the probability of relation of increasing age compared to cardiac size and

diameter of descending branch of right pulmonary artery which may imply to be pulmonary hypertension.

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Researcher has measured means PM2.5 of whole year in experimental building which showed

higher values than other area in same district which could be effected from aircraft pollution. Means
temperature of whole year, about 33 degree Celsius during working hour, was measured at top of chlorine
tank which worker need to stay there for working under risk of exposure to chlorine vapor under hot climate.

At the first glance, data of diaphragmatic difference showed wide range of distribution while there
may be no statistical difference of cardiothoracic ratio between controlled and experimental group. There
are slightly higher of means in age in experimental group compared with controlled group.

When focusing on the correlation of coefficient, we observed some correlations between age with
diameter of descending branch of right pulmonary artery. Age was separated into 4 groups prior using SPSS
for analysis in Table[2], first is less than 25 years-old, second group is 25 until less than 35 years-old, third

group is 35 until less than 45 years-old and last group is 45 years-old and higher. However, there is no
significant correlation between age with CT ratio. The expression of difference in correlation coefficient is
higher than 0.25 while p value shall be lower than 0.05.

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