Exam 7: Sampling: Estimating the Frequency of Behaviors and Beliefs

Dr.Cyril conducts a simple random sample of 500 men who became fathers for the first time in the last year.He finds that 23% of them report being unsure of their ability to be good fathers,plus or minus 4%.What is another term for the 4% value?

Which of the following is true of probability sampling?

In which of the following cases would a large sample especially be needed?

What is the most common sampling technique in behavioral research?

Dr.Oishi is an educational psychologist interested in students' attitudes toward math and the effect of those attitudes on performance on standardized tests.He chooses his local school district to study.There are 15 middle schools,and he randomly chooses five.Then,of the 1,500 students in each of those five schools,he randomly recruits 250 students.This is an example of which of the following sampling techniques?

Dr.Dowling is a clinical psychologist who is interested in the link between mental illness and criminal activity.She gets IRB permission to study patients at all five inpatient/residential mental health facilities in her state.There are 4,307 patients currently living in these facilities.She asks patients whether they have ever been arrested for a crime and whether they have ever been convicted of a crime.She collects a sample size of 1,369.She finds that 27% (+/- 3%)report having been arrested for a crime but that only 13% (+/- 3%)have been convicted of a crime. -Dr.Dowling is interviewed by a journalist about the findings of her study.The journalist asks her to explain what it means that "27% of the sample (+/- 3%)report having been arrested for a crime."

Why are techniques like cluster sampling and multistage sampling just as externally valid as simple random sampling?

Dr.Dowling is a clinical psychologist who is interested in the link between mental illness and criminal activity.She gets IRB permission to study patients at all five inpatient/residential mental health facilities in her state.There are 4,307 patients currently living in these facilities.She asks patients whether they have ever been arrested for a crime and whether they have ever been convicted of a crime.She collects a sample size of 1,369.She finds that 27% (+/- 3%)report having been arrested for a crime but that only 13% (+/- 3%)have been convicted of a crime. -Indicate Dr.Dowling's population size,sample size,and population estimate for the two variables along with their margins of error

Which of the following does NOT result in a representative sample?

The difference between a cluster sample and a stratified random sample is:

Dr.Parrett is a sports psychologist for a large Southern university.The provost and chancellor have asked him to examine the relationship between athletic performance and academic stress at the university.For example,is it the case that the most talented athletes experience the greatest concern over their grades? The provost and chancellor have made it clear to Dr.Parrett that they want a large amount of external validity in the study.He has valid and reliable measures of both athletic performance and academic stress.He knows that he does not have the time or the money to study the entire population of interest. -Describe the three sampling problems that could lead to a biased sample for Dr.Parrett.

A population is to ________ as a sample is to ________.

Oversampling is a variant used in which of the following sampling techniques?

Dr.Cyril conducts a simple random sample of 500 men who became fathers for the first time in the last year.He finds that 23% of them report being unsure of their ability to be good fathers,plus or minus 4%.If Dr.Cyril increased his sample size to 1,000,which of the following would happen?

Which of the following does NOT result in a biased sample?