Exam 7: Producing Data- Sampling

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist used an introductory sociology class to carry out the survey, instructing the students to participate only if they were freshmen. The sample consists of:

A properly designed survey should have which of the following?

Each month, the census bureau mails survey forms to 250,000 households asking questions about the people living in the household and about such things as motor vehicles and housing costs. Telephone calls are made to households that don't return the form. In one month, responses were obtained from 240,000 of the households contacted. The population of interest is:

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist used an introductory sociology class to carry out the survey. The sociologist has learned from previous studies that females and males often behave differently regarding study and sleep patterns. She decides that she needs to ensure adequate numbers of females and males. She should take:

A political party sends a mail survey to 1500 randomly selected registered voters in a community. The survey asks respondents to give an opinion about the job performance of the current president. Of the 1500 surveys sent out, 480 are returned, and of these, only 120 show that the respondent is satisfied with the president's job performance. The population is:

Advice columnist Ann Landers once asked her readers with children to answer the following question: "If you had it to do over again, would you have children?" Readers were invited to send a response to this question by mail. Of the approximately 10,000 responses Landers received, approximately 70% said "no." The sample:

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist, who knows about proper sampling, selects which type of a sample?

At a large university, a simple random sample of five female professors is selected, and a simple random sample of 10 male professors is selected. The two samples are combined to give an overall sample of 15 professors. The overall sample is:

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist used an introductory sociology class to carry out the survey. The population of interest is:

Surveys, if not done correctly, can lead to seriously biased samples. Which of the following is not a bias due to the sampling plan?

To assess the opinion of students at The Ohio State University about campus safety, a reporter for the student newspaper interviews 15 students that she meets walking on the campus late at night who are willing to give their opinion. The sample is:

A group of veterinarians at a major veterinary hospital was interested in investigating a possible link between enteroliths (stones that form in the colon of horses) and diet. They decided to conduct a survey of the feeding practices for horses admitted to the veterinary hospital. To obtain a simple random sample, they used a computer to generate 4-digit ID numbers for all horses. They used random digit tables to select the horses. Which of the following is a step in selecting a random sample by this procedure?

A group of veterinarians at a major veterinary hospital was interested in investigating a possible link between enteroliths (stones that form in the colon of horses) and diet. They decided to conduct a survey of the feeding practices for horses admitted to the veterinary hospital. To obtain a random sample of the 5000 horses that had been admitted to the hospital over the last 10 years, the veterinarians sequentially assigned numbers (starting with 1) to the horses, in order of admittance. They then picked a random starting point and decided to sample every hundredth horse to get a random sample of 50 horses. This procedure corresponds to:

To assess the opinion of students at The Ohio State University about campus safety, a reporter for the student newspaper interviews 15 students that she meets walking on the campus late at night who are willing to give their opinion. The sample obtained is:

To select a sample of undergraduate students in the United States, I first select a simple random sample of four states. From each of these states, I select a simple random sample of two colleges or universities. Finally, from each of these eight colleges or universities, I select a simple random sample of 20 undergraduates. My final sample consists of 160 undergraduates. This is an example of:

A small math department has six faculty members and 30 students. The department can send six people to a national convention, and it would like to send four students and two faculty members. Of the 30 students, four are selected randomly. Two faculty members are randomly selected from the six. This is an example of:

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist used an introductory sociology class to carry out the survey and asked only the freshmen to answer the questions. The sample is called:

A sociologist studying freshmen at a major university carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologist decides to use his introductory sociology class to conduct the survey. If the survey is not representative of the freshmen at the university, the conclusions from the study are likely to be:

Advice columnist Ann Landers once asked her readers with children to answer the following question: "If you had it to do over again, would you have children?" Readers were invited to send a response to this question by mail. Of the approximately 10,000 responses Landers received, approximately 70% said "no." The sample is:

A news release for a diet product company reports: "There's good news for the 65 million Americans currently on a diet." Its own study showed that people who lose weight can keep it off. The sample was 20 graduates of the company's program who endorsed the program in commercials. The results of the sample are probably: