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
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
Statistics%20for%20Managers%20Using%20Microsoft%20Excel%20Defining%20and%20Collecting%20Data.docx