Sloep apnea is a disorder in which you have one or more pauses in breathing or shalow breaths while you sleep. In a cross-sectional study of 310 adults who sufor 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? OA 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. OD. 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 OB Whether a person has sloep apnea or not OC. The proportion of gum disease present in those with sleep apnea OD. Whether a person has gum disease or not Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below. OA The variable is quantitative because it dlassifies the individuals in the study. X8. The variable is quantitative because it can be numerically measured. *c. The variable is qualitative because it dassifies the individuals in the study. OD. 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 resuit. Select the correct choice below and fil in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) OA There is 99% confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between and. OB. 99% of the population lies in the interval between and- OC. There is a 99% chance that the true population proportion of individuals who sufer from sleep apnea who have gum disease is between and

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