Exam 7: Qualitative and Quantitative Sampling

Define the following terms -purposive sampling

When is it appropriate to use a snowball sampling technique?

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 address of a telephone customer is your

Using an example,how can you get a sampling interval from a sampling ratio? What type of sampling is the sampling interval used with?

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?

Define the following terms -cluster sampling

Market researcher Tanya Tanika wants to test whether men like a new flavour of yogurt,which tastes like cigar smoke and beer,more than women do.She distributes samples at a grocery store,including 50 samples in blue cups to adult males and 50 samples in pink cups to adult females shopping alone.Afterward,she checks shelves and garbage cans to locate the used blue and pink cups and measures whether more waste (i.e.,uneaten yogurt)was left in blue or pink cups.What type of sampling was used in the study?

Define the following terms -population

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?

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

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?

Why is it important to have an accurate sampling frame?

Professor Bobby Birdfeather wants to study how people join a small extremist political organization dedicated to right-wing causes.He first interviews recent recruits and asks who introduced him/her to the organization.He next interviews the named person and asks who introduced him/her to the organization,and so on.What kind of sampling is this?

The Toronto Fire Department has hired you to generate an accurate estimate of how many homes have operational fire prevention systems.The Chief Fire Inspector gave you a list of two million residential telephone customers in the city.You sampled every two-thousandth address on the list.You survey each sampled household by telephone. How large is your sample?

_____ 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.

Define the following terms -probability sample

Define the following terms -confidence intervals

Define the following terms -sampling distribution

Define the following terms -random-digit dialing (RDD)

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?