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(a) What does it mean for this study to be cross-sectional? OA. The data were obtained over the course of time and the study was an observational study. OB. The data were obtained at a specific point in time and the study was an experiment. OC. The data were obtained over the course of time and the study was an experiment. OD. The data were obtained at a specific point in time and the study was an observational study.

(a) What does it mean for this study to be cross-sectional? OA. The data were obtained over the course of time and the study was an observational study. OB. The data were obtained at a specific point in time and the study was an experiment. OC. The data were obtained over the course of time and the study was an experiment. OD. The data were obtained at a specific point in time and the study was an observational study.

MATLAB: An Introduction with Applications
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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Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 390 adults who suffer from sleep apnea, it was found that 273 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Click here to view the table of critical t-values. 4 (a) What does it mean for this study to be cross-sectional?
Transcribed Image Text:Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 390 adults who suffer from sleep apnea, it was found that 273 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Click here to view the table of critical t-values. 4 (a) What does it mean for this study to be cross-sectional?
(a) What does it mean for this study to be cross-sectional? OA. The data were obtained over the course of time and the study was an observational study. OB. The data were obtained at a specific point in time and the study was an experiment. OC. The data were obtained over the course of time and the study was an experiment. O D. The data were obtained at a specific point in time and the study was an observational study. (b) What is the variable of interest in this study? Is it qualitative or quantitative? Explain. Identify the variable of interest. Choose the correct answer below. O A. Whether a person has gum disease or not. OB. The proportion of gum disease present in those with sleep apnea. OC. Whether a person with sleep apnea has gum disease or not. OD. Whether a person has sleep apnea or not. O (?) Type here to search 3 4 D % 5 O 6 i P 7 hp 8 1 CO) MM M
Transcribed Image Text:(a) What does it mean for this study to be cross-sectional? OA. The data were obtained over the course of time and the study was an observational study. OB. The data were obtained at a specific point in time and the study was an experiment. OC. The data were obtained over the course of time and the study was an experiment. O D. The data were obtained at a specific point in time and the study was an observational study. (b) What is the variable of interest in this study? Is it qualitative or quantitative? Explain. Identify the variable of interest. Choose the correct answer below. O A. Whether a person has gum disease or not. OB. The proportion of gum disease present in those with sleep apnea. OC. Whether a person with sleep apnea has gum disease or not. OD. Whether a person has sleep apnea or not. O (?) Type here to search 3 4 D % 5 O 6 i P 7 hp 8 1 CO) MM M
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