List the characteristics (a)-(f) on the basis of the brief description of the survey shown below. In one of its issues, a magazine asked all of its readers to participate in a survey of their satisfaction with different brands of computer systems and peripherals. In the 2004 survey, more than 7,000 readers rated the products on a scale from 1 to 10. The magazine reported that the average rating assigned by 250 readers to a certai graphing calculator was 6.5. 7,000 V 250 6.5 The sample size is unknown. (e) Identify the sampling design, including whether randomization was employed. Choose the correct answer below. O simple random sampling O stratified sampling, random not specified O voluntary response, not random (f) Identify any potential sources of bias or other problems with the survey or sample. Select all that apply. O A. Nonresponse bias is possible, because it is very unlikely that everyone who saw the survey responded to it. O B. Voluntary response bias is possible, because it is likely that only those people with strong opinions about the product would answer the survey. O C. Convenience sampling bias is possible, because only people who own the graphing calculator were counted. O D. There is no indication of bias.