Exam 1: Where Do Data Come From

Can pleasant aromas help people work more efficiently? Researchers did this study to find out. Twenty-two students worked a paper-and-pencil maze six times. On three tries, they wore a mask with floral scents. On the other three tries, they wore a mask with no scent. The six tries were done in random order and each used a different maze. The researchers found that the subjects took less time to complete the maze when wearing the scented mask. The response variable for this study is

The response variable for this study is:

A(n) _____________ is the entire collection of subjects about which we would like information.

A Pew Research Council Poll recently showed that 23 percent of Americans are religiously unaffiliated. The poll contacted 35,071 adults by telephone. The margin of sampling error was plus or minus 0.6 (six-tenths) of a percentage point. Assume a 95 percent confidence level and no bias. The population for this sample survey is:

The administration of Virginia Commonwealth University has been asked to extend the Drop/Add Period to two weeks (instead of the current one week period). VCU will do so if it is convinced that more than half of the student body is in favor of this change. Of the 1500 students surveyed, 803 are in favor of extending the Drop/Add Period as proposed. The study is a(n)

The administration of Virginia Commonwealth University has been asked to extend the Drop/Add Period to two weeks (instead of the current one week period). VCU will do so if it is convinced that more than half of the student body is in favor of this change. Of the 1500 students surveyed, 803 are in favor of extending the Drop/Add Period as proposed. The population for this study is

A 2016 national sample survey interviewed 1012 people aged 18 and older, nationwide, by telephone. One question asked was "We'd like you to imagine a ladder with steps numbered from zero at the bottom to ten at the top. Suppose the top of the ladder represents the best possible situation for our country and the bottom represents the worst possible situation. Please tell me the number of the step on which you think the United States stands at the present time?" The population for this sample survey appears to be:

Can pleasant aromas help people work more efficiently? Researchers did this study to find out. Twenty-two students worked a paper-and-pencil maze six times. On three tries, they wore a mask with floral scents. On the other three tries, they wore a mask with no scent. The six tries were done in random order and each used a different maze. The researchers found that the subjects took less time to complete the maze when wearing the scented mask. This study is a(n)

In the weeks immediately following Supreme Court Associate Justice Antonin Scalia's death, much focus was on the conflict between President Obama's suggestion that he must fill the position and the Republican-led Senate Judiciary committee's resistance to his doing so. At this time, a Pew Research Poll of 1002 adults found that a majority of Americans (56 percent) said that the Senate should hold hearings and vote on President Obama's choice to fill the vacancy. The sample for this study is:

In the weeks immediately following Supreme Court Associate Justice Antonin Scalia's death, much focus was on the conflict between President Obama's suggestion that he must fill the position and the Republican-led Senate Judiciary committee's resistance to his doing so. At this time, a Pew Research Poll of 1002 adults found that a majority of Americans (56 percent) said that the Senate should hold hearings and vote on President Obama's choice to fill the vacancy. The population for this study is:

Can pleasant aromas help people work more efficiently? Researchers did this study to find out. Twenty-two students worked a paper-and-pencil maze six times. On three tries, they wore a mask with floral scents. On the other three tries, they wore a mask with no scent. The six tries were done in random order and each used a different maze. The researchers found that the subjects took less time to complete the maze when wearing the scented mask. The population for this study is

A Gallup Poll asked 1022 randomly chosen adults whether the failure of the government to solve major challenges facing the country was a "crisis," a "major problem," a "minor problem," or "not a problem." The proportions giving each response were 30 percent, 51 percent, 14 percent, and 4 percent (percents don't add to 100 due to rounding error), respectively. The sample for this poll is:

The General Social Survey (GSS), conducted by the National Opinion Research Center at the University of Chicago, is a major source of data on social attitudes in the United States. Once each year, 1500 adults are interviewed in their homes all across the country. The subjects are asked their opinions about sex and marriage, attitudes toward women, welfare, foreign policy, and many other issues. The GSS is an example of

The essential difference between an experiment and an observational study is that

You want to know the opinions of American school teachers about establishing a national test for high school graduation. You obtain a list of the members of the National Education Association (the largest teachers' union) and mail a questionnaire to 2500 teachers chosen at random from this list. In all, 1347 teachers return the questionnaire. In this situation, the population is

A psychologist wants to know if adults with normal vision can be fooled by a certain optical illusion. She recruits 50 students from her PSY 120 class and finds that 42 of them are fooled by the illusion. The population in this study is

An editorial writer for the East Mule Shoe Gazette wants to measure public support for a discontinued construction project that has left a city-block-size hole in the middle of the East Mule Shoe downtown area, so he uses his lunch hour one day to walk down the block adjacent to the project and ask the first 25 people who will talk to him about whether they support continuing the project. The population for the survey is:

A(n) _____________ is a single subject or object to be measured or studied.

You measure the age (years), weight (pounds), and marital status (single, married, divorced, or widowed) of 1400 women. How many variables did you measure?

In the weeks immediately following Supreme Court Associate Justice Antonin Scalia's death, much focus was on the conflict between President Obama's suggestion that he must fill the position and the Republican-led Senate Judiciary committee's resistance to his doing so. At this time, a Pew Research Poll of 1002 adults found that a majority of Americans (56 percent) said that the Senate should hold hearings and vote on President Obama's choice to fill the vacancy. This study is a(n):