C) Both of the D) None of the above Answer: B Keywords: measurement error, survey worthiness 146) Which of the following sampling methods will more likely be susceptible to ethical violation? A) simple random sample B) cluster sample C) convenience sample D) stratified sample Answer: C Keywords: ethical issues, sampling method 147) Which of the following sampling methods will more likely be susceptible to ethical violation when used to form conclusions about the entire population? A) simple random sample B) cluster sample C) judgment sample D) stratified sample Answer: C Keywords: judgment sample, ethical issues, sampling method 148) Which of the following sampling methods will more likely be susceptible to ethical violation when used to form conclusions about the entire population? A) simple random sample B) cluster sample C) systematic sample D) convenience sample Answer: D Keywords: convenience sample, ethical issues, sampling method 149) True or False: As a population becomes large, it is usually better to obtain statistical information from the entire population. Answer: Keywords: population, sample, reasons for samplings 150) True or If a simple random sample is chosen with replacement, each individual has the same chance of selection on every selection. Answer: TRUE Keywords: simple random sample, probability sample, sampling method, sampling with replacement, sampling without replacement 151) True or When dealing with human surveys, we are usually interested in sampling with replacement. Answer: FALSE
Answer: TRUE Keywords: systematic sample, stratified sample 162) True or False: The professor of a business statistics class wanted to find out the mean amount of time per week her students spent studying for the class. Among the 50 students in her class, 20% were freshmen, 50% were sophomores and 30% were juniors. She decided to select 2 students randomly from the freshmen, 5 randomly from the sophomores and 3 randomly from the juniors. This is an example of a systematic sample. Answer: Keywords: stratified sample 163) To estimate the mean number of hours a student at a major university spent in the library, a researcher obtained the list of students from the registrar's office, from which she can select a random sample of 200 students. This list is a ________. Answer: Keywords: 164) ________ results from the exclusion of certain groups of subjects from a population frame. Answer: Coverage error Keywords: coverage survey worthiness, frame 165) Coverage error results in a ________. Answer: selection bias Keywords: selection bias, survey worthiness 166) ________ results from the failure to collect data on all subjects in the sample. Answer: Nonresponse error or bias Keywords: nonresponse error, survey worthiness 167) The sampling process begins by locating appropriate data sources called ________. Answer: frames Keywords: frame, sampling method 168) True or False: If you randomly select a student from the first row of a business statistics class and then every other fifth student thereafter until you get a sample of 20 students, this is an example of a convenience sample. Answer: FALSE Keywords: chunk sample 169) True or False: You stand at the main entrance to a departmental store and pick the first 20 customers that enter the store after it has opened its door for business on a single day. This is an example of a systematic sample. Answer: FALSE