Exam 7: Qualitative and Quantitative Sampling

_____ combines characteristics of the sample,such as the sample's size,with the central limit theorem for the purpose of accurately predicting specific ranges around a population parameter.

Sam Smith,the CEO of a local TV station,recently conducted a study of TV watchers in his area.He obtained a list of all residential customers from the cable TV company's billing list.He selected customers from the 20 000 households on the billing list by taking every fortieth household.A trained interviewer then visited each household and asked detailed questions about the viewing habits of various family members. What is Sam Smith's sampling ratio?

Define the following:theoretical sampling

Define the following:systematic sampling

An example of a sampling technique where everyone in the target population is counted is

Define the following:sequential sampling

Janet Jones wants to know how many of her classmates completed professional degrees after graduating in 2008.Janet obtains contact information for the graduating class of 2008 from the registrar.The list has 4000 names.After a random start,Janet contacts every eightieth graduate.What is her sampling ratio?

Define the following:sampling error

Define the following:margin of error

What steps are involved when drawing a cluster sample? Illustrate your answer with an example and also a summary of how you obtained the sample of 240 respondents.

Professor Mary Mancini studied class level and drinking behaviour at Rocky Mountain University in Red Deer,Alberta.At Rocky Mountain,every student is required to live in one of six 20-story dormitories,and every student has a single room.All dormitory room phone numbers begin with the prefix 747 or 757 (e.g.,phone numbers are 747-0001 to 757-9999).She used the student telephone directory and,after a random start,selected every fifteenth student.She then mailed a questionnaire to the 1000 students selected and had two follow-up postcard reminders.A total of 900 students returned questionnaires.Later,Professor Mancini asked the university registrar's office whether any students were omitted from the directory. What is Professor Mancini's target population?

Professor Mary Mancini studied class level and drinking behaviour at Rocky Mountain University in Red Deer,Alberta.At Rocky Mountain,every student is required to live in one of six 20-story dormitories,and every student has a single room.All dormitory room phone numbers begin with the prefix 747 or 757 (e.g.,phone numbers are 747-0001 to 757-9999).She used the student telephone directory and,after a random start,selected every fifteenth student.She then mailed a questionnaire to the 1000 students selected and had two follow-up postcard reminders.A total of 900 students returned questionnaires.Later,Professor Mancini asked the university registrar's office whether any students were omitted from the directory. What is Mary Mancini's sampling frame?

Which of the following is NOT something a researcher's decision about the best sample size depends on?

When is it appropriate to use a snowball sampling technique?

Define the following:central limit theorem

Professor Johnny Jones draws a systematic sample of 350 churches from all churches and religious institutions in the three Pacific coast states of the continental U.S.and British Columbia.His sampling frame has 35 000 institutions. What is the sampling interval?

Define the following:inferential statistics