In a survey conducted by a reputable marketing agency, 253 of 1000 adults 19 years of age or older confessed to bringing and using their cell phone every trip to the bathroom (confessions included texting and answering phone calls). Complete parts (a) through (f) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2) (a) What is the sample in this study? What is the population of interest? Determine the sample in this study. Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The sample is the (Type a whole number.) adults 19 years of age or older. OB. The sample is all adults with a cell phone. OC. The sample is all adults. OD. The sample is all adults 19 years of age or older. Determine the population of interest. Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The population is the (Type a whole number.) adults 19 years of age or older. OB. The population is all adults. O C. The population is all adults 19 years of age or older. OD. The population is all adults with a cell phone. (b) What is the variable of interest in this study? Is it qualitative or quantitative? The variable of interest is This variable is because (c) Based on the results of this survey, obtain a point estimate for the proportion of adults 19 years of age or older who bring their cell phone every trip to the bathroom. (Round to three decimal places as needed.) (d) Explain why the point estimate found in part (c) is a statistic. Explain why it is a random variable. What is the source of variability in the random variable? Why is the point estimate found in part (c) a statistic? OA. It is information obtained from a survey. OB. It is being used to make inferences. OC. Its value is based on a sample. OD. The sample size is large.