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 310 adults who suffer from sleep apnea, it was found that...

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Extracted 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 310 adults who suffer from sleep apnea, it was found that 155 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. ..... (a) What does it mean for this study to be cross-sectional? O A. The data were obtained at a specific point in time and the study was an experiment. B. The data were obtained over the course of time and the study was an observational study. C. The data were obtained at a specific point in time and the study was an observational study. D. The data were obtained over the course of time and the study was an experiment. (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. A. Whether a person with sleep apnea has gum disease or not B. Whether a person has sleep apnea or not C. The proportion of gum disease present in those with sleep apnea O D. Whether a person has gum disease or not Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below. A. The variable is quantitative because it classifies the individuals in the study. B. The variable is quantitative because it can be numerically measured. C. The variable is qualitative because it classifies the individuals in the study. D. The variable is qualitative because it can be numerically measured. (c) Estimate the proportion of individuals who suffer from sleep apnea who have gum disease with 99% confidence. Interpret your result. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) O A. There is 99% confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between and O B. 99% of the population lies in the interval between and. O C. There is a 99% chance that the true population proportion of individuals who suffer from sleep apnea who have gum disease is between and