# Psych3510 Chapter 7

question

Dr. Jennings is doing a study on the experience of being a racial minority on a college campus. He goes to the Asian Student Association, Black Student Union, and Hispanic Student Group n his campus to recruit participants for his study. Dr. Jennings only includes Asians, African-Americans, and Hispanic participants in his study. What type of sampling is Dr. Jennings using?

Purposive Sampling
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Beth is working on a research study focused on attention span in children. Among the participants, the group of 11-year old boys is underrepresented. Beth asks her 11-year old brother to distribute flyers about participation in the study to his male classmates and soccer team. What type of sampling is this?

Snowball
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Which of the following is considered a biased sampling method? -Convenience Sampling -Cluster Sampling -Stratified Random Sampling -Simple Random Sampling

Convenience Sampling
question

A political research center obtains a list of phone numbers of all registered voters in Texas and uses a random number generator to select 1,000 of the phone numbers to call. They ask each voter which gubernatorial candidate they plan to vote for in the upcoming election. What is the population of interest that the research center wants to generalize to?

All registered voters in Texas
question

Dr. Rhodes is interested in how differing levels of light affect how people perceive color. He finds participants for this research study by making an announcement in several psychology classes at his University. What kind of sampling is Dr. Rhodes using?

Convenience Sampling
question

The superintendent of schools in a small town in Ohio made a lot of policy changes to the way school administrators worked in his district. A researcher at a nearby university wanted to look at what teachers in his district thought about the changes. The researcher made a list of all of the schools in the district and used a random number generator to select a sample of five schools from the district. Then the researcher interviewed each teach at each of those 5 schools. What sampling method did the researcher use?

Cluster sampling
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A _____ is the entire set of people in which researchers are interested

Population
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Mr. Stratford is the president of a national organization of lesbian, bisexual, gay, and transgender people in the United States. He wants to survey 1,000 members of his organization about the position they want the organization not to take on several political issues. He knows that transgender people make up only 5% of his organization. But he wants to make sure that their views are accurately represented. He decides that he will randomly sample 100 transgender members and then adjust the final results so that transgender people are weighted to their actual proportion in the organization. What type of sampling is Mr. Stratford using?

Oversampling
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Which sample would be most likely to represent the population of American teenagers?

A cluster sampling of 1,000 teenagers from around the United States
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Which of the following is most important for enhancing external validity?

Random sampling
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What kind of sample is best for external validity?

A sample where each member of the population has an equal chance of being selected
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A college administrator knows that 70% of the students at his college are from out of state, so he decides to make sure that he includes 70 out of state students and 30 in state students in his survey about admission practices at the college. He randomly selects 70 students from the out of state list and 30 students from the in state list. What sampling method is he using?

Stratified random sampling
question

_____ is when you study every member of a population

Census
question

A political research center obtains a list of phone numbers for all registered voters in Texas and uses a random number generator to select 1,000 of the phone number to call. They ask each voter which gubernatorial candidate they plan to vote for in the upcoming election. What sampling method is being used?

Simple random sampling
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Which of the following is considered a representative sampling method?

Systematic Sampling
question

The campus safety committee has asked Professor Ibrahim to study bicycling on his campus. He trains two observers and has them observe the number of cyclists and their safety at various points around campus. He selects 10 observation locations at random from the places bicycles can be ridden on campus and five one-hour spans of time at random from daylight hours at each place. He had his observers make observations at each of the ten places for each of the five time spans. What type of sampling is he using?

Multistage sampling
question

The directors of an annual community concert want to find the musical preferences of the audience. The ushers place a survey card on every sixth seat beginning with the second seat (2 and 6 were chosen form a random number table). All of the cards are returned as the audience leaves. Which type of sampling is being used?

Systematic Sampling
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Dr. Lawrence is the director of Counseling Services at her university. She is planning to conduct a survey of 100 students at the university to see how aware they are of the counseling services that are offered at the university. She wants the proportion of males and females in her sample to reflect the proportion in the university as a whole. Dr. Lawrence plants to stand in the Student Union and ask people to participate until she has given the survey to 55 females and 45 males. What type of sampling method is Dr. Lawrence going to use?

Quota Sampling
question

Mr. Stratford is the president of a national organization of lesbian, bisexual, gay, and transgender people in the United States. He wants to survey 1,000 members of his organization, but he wants to make sure that their views are accurately represented. He decides that he will randomly sample 100 transgender members and teh nadjust the final results so that transgender people are weighted to their actual proportion in the organization. Is Mr. Stratford collecting a representative sample?

Yes, because the transgender people in the final sample were sampled randomly from the population of transgender people in the organization
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A sample is always ____ a population

smaller than
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What sample size is often cited as the optimal balance between accuracy and effort?

1,000
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The student government at a college is interested in determining how important intercollegiate sports are to the students there. Since all students have e-mail accounts, they are able to send a survey to all the students. About 50% of the students respond. Which is the most likely bias in this sample?

Self-selection bias
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What kind of sample is best for external validity?

A sample where each member of the population has an equal chance of being selected
question

Dr. Rhodes is interested in how differing levels of light affect how people perceive color. He finds participants for this research study by making an announcement in several psychology classes at his university. Should Dr. Rhodes be concerned about using this sampling method?