output 5 2nd submission
TRANSCRIPT
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DE LA SALLE HEALTH SCIENCES INSTITUTE COLLEGE OF MEDICINE
DEPARTMENT OF FAMILY AND COMMUNITY MEDICINE
CM2 SY 2011-2012
REVISED OUTPUT 5: SAMPLE SIZE
SUBMITTED ON:
SEPTEMBER 13, 2011
SUBMITTED TO:
DR. JOVILIA M. ABONG
SUBMITTED BY:
GROUP 1A
ARCAIRA, JOSHUA A.
ABAD, RAINA
ANCHETA, JONATHAN B.
BASUL, CHARINE
CARAVEO, JULIEN NICOLE
CRUZ, SPICA
ESPINOZA, FAITH KRISTINE
GARCIA, RAY WILSON
KALALO, GERARD MICHAEL
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OUTPUT 5: SAMPLE SIZE
I. Group 1A, Dr. Jovilia M. Abong
II. Research Question: Among second year high school students with allergic rhinitis of selected schools
in Dasmarias, Cavite, will exposure to air-conditioned school rooms affect the severity of their
allergic rhinitis?
General Objective: To determine if the exposure to the air-conditioning system affects the severity
of allergic rhinitis in second year high school students of selected schools in Dasmarias, Cavite.
Specific Objectives:
1. To identify the prevalence of allergic rhinitis among second year high school students of
selected schools in of Dasmarias, Cavite based on their exposure to air-conditioned rooms.
2. To identify the prevalence of allergic rhinitis among second year high school students of
selected schools in Dasmarias, Cavite based on their exposure to non-air-conditioned
classrooms.3. To determine the severity of allergic rhinitis according to ARIA classifications.
4. To identify the risk factors of allergic rhinitis present in the classroom or school, such as the
presence of pollen, molds, and cockroaches.
5. Compare the severity of allergic rhinitis in students who are exposed to air-conditioned
classrooms and those who are not exposed to air-conditioned classrooms.
III. Research Design: Cross-Sectional Study
IV. Definition of variables used in the calculations
1. p1The p1 variable is the estimate of the sample population for the high school students who
study in air-conditioned classrooms that have mild allergic rhinitis.
2. p2The p2 variable is the estimate of the sample population for the high school students who
study in non-air-conditioned classrooms that have mild allergic rhinitis.
3. AlphaAlpha is the probability of committing a type I error, which means rejecting the null hypothesis
when in fact the null hypothesis is true. In the study, this is when results show that there is no
association between exposure to air-conditioning system and alleviation of severity of AR when
in fact there is.
4. BetaBeta is the probability of committing a type II error, which means retaining the null hypothesis
when the null is false. In the study, this is when we fail to reject the null hypothesis even if there
is sufficient evidence to state otherwise.
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5. Direction of TestThe study is a one tailed test because we are leaning towards the result of which air-conditioning
helps in alleviating the severity of AR.
V. Values
1. p1 = 30.72. p2 = 13.43. alpha = 0.954. beta = .80
The p1 and p2 values were based on the following study:
Mendell, M.J. & Smith, A.H. (1990). Consistent Pattern of Elevated Symptoms in Airconditioned Office
Buildings: A Reanalysis of Epidemiologic Studies.American Journal of Public Health. (80) 10.
VI. Sample Size
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APPENDIX
Excerpt from the study in which the values were obtained.