Exam 7: Qualitative and Quantitative Sampling

Define the following: -systematic sampling

Marcus McDonald is a qualitative researcher who studies people with agoraphobia.Rather than generating a purposive sample,Marcus decides to interview persons with agoraphobia until his interviews no longer yield new information.What point will Marcus have to reach before he can stop conducting interviews?

What is the main difference between simple random sampling and systematic sampling?

Sampling error is based on which of the following?

The Young Children's Charity of Eastern Canada would like an accurate estimate of how much it costs to raise a child between the ages of 2 and 12 each year for its fundraising campaign.The organization hired you to find out how much households spent on raising a child in 2011.The charity gave you a list of four million residential telephone customers in the area.You sampled every four-thousandth address on the list.You survey each sampled household by telephone. In this study,each residential telephone customer is your

What is the type of sampling that seeks a representative sample using theories from mathematics called?

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?

When is it appropriate to use a snowball sampling technique?

Define the following: -random number table

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 ratio?

Define the following: -statistic

Define the following: -population

Postdoctoral fellow Walter Waters used nonrandom sampling in his study of successful scientists.He knew most got excellent grades in high school and university,excelled in mathematics,and had a strong interest in science from a very young age.For his study,he was interested in sampling those who were successful as adult scientists but did poorly in high school,did average or worse in math classes,and showed little interest and aptitude in science until they reached university.What type of sampling was he using?

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: -snowball sampling

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

Define the following: -theoretical sampling

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 .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?

What three basic steps need to be taken when drawing a systematic sample?

How do researchers decide on the size of a sample to use in quantitative research?