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 420 adults who suffer from sleep apnea, It was found that 252 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. U U. WINQUIET a PUISUll Has yuIll VISUaBU VI IIUL. Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below O A. Quantitative-the variable can be numerically measured. O B. Qualitative-the variable classifies the individuals in the study. O C. Qualitative-the variable can be numerically measured. O D. Quantitative-the variable classifies the individuals in the study. (c) Estimate the proportion of individuals who suffer from sleep apnea who have gum disease with 90% 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 a 90% chance that the true population proportion of individuals who suffer from sleep apnea who have gum disease is between and O B. There is 90% confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between and O C. 90% of the population lies in the interval between and