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). E. Its value may change depending on the individuals in the survey. Why is the point estimate found in part (c) a random variable? OA. It is being used to make inferences. OB. Its value is based on a sample. OC. Its value may change depending on the individuals in the survey. OD. The sample size is large. OE. It is information obtained from a survey. What is the source of variability in the random variable? OA. The question asked in the survey OB. The individuals selected to be in the study OC. The sample size OD. Random errors (e) Construct and interpret a 95% confidence interval for the population proportion of adults 19 years of age or older who bring their cell phone every trip to the bathroom. Select the correct choice below and fill in any answer boxes within your choice. (Type integers or decimals rounded to three decimal places as needed. Use ascending order.) OA. We are % confident the proportion of adults 19 years of age or older who bring their cell phone every trip to the bathroom is between and OB. There is a % probability the proportion of adults 19 years of age or older who bring their cell phone every and trip to the bathroom is between (f) What ensures that the results of this study are representative of all adults 19 years of age or older? OA. The high confidence level OB. Random sampling OC. The large sample size OD Sampling from adults 19 years of age or older