1.1
Population and Sample
Population and Sample
A survey of 1000 U.S. adults found that 83% think that credit cards tempt people to buy things they cannot afford.
Population: All U.S. adults
Sample: 1000 U.S. adults
The 2009 team payroll of the Philadelphia Phillies was $113,004,046.
Parameter
The monthly salaries of the employees at an accounting firm.
Quantitative
The daily high temperatures (in degrees Fahrenheit) for Mohave, Arizona for a week in June are listed below:
93, 91, 86, 94, 103, 104, 103
Interval
A study of charitable donations of the CEOs in Syracuse, New York
Survey
Using random digit dialing, researchers ask 1003 U.S. adults their plans on working during retirement.
SRS
Thirty-eight nurses working in the San Francisco area were surveyed concerning their opinions of managed health care.
Population: All nurses in the SF area
Sample: 38 nurses in the survey
In a survey of 752 adults in the United States, 42% think there should be a law that prohibits people from talking on cell phones in public areas.
Statistic
The Social Security Numbers of the employees at the accounting firm.
Qualitative
The levels of the Homeland Security Advisory System are listed below:
Severe, High, Elevated, Guarded, Low
Nominal or Ordinal
A study of the effect of koalas on the ecosystem of Kangaroo Island, Australia.
Experiment
A student asks 18 friends to participate in a psychology experiment.
A survey of 39 credit cards found that the average annual percentage rate (APR) is 12.83%.
Population: All credit cards
Sample: 39 credit cards
In a recent study of math majors at a university, 10 students were minoring in physics.
Parameter
The ages of a sample of 350 employees of a software company.
Quantitative
The four departments of a printing company are listed below:
Administration, Sales, Production, Billing
Nominal
A study of how training dogs from animal shelters affects inmates at a prison.
Experiment
A pregnancy study in Cebu, Philippines randomly selects 33 communities from the Cebu metropolitan area, then interviews all available pregnant women in these communities.
The zip codes of a sample of 350 customers at a sporting goods store.
Qualitative
A study of college professor' opinions on teaching classes online.
Survey
Law enforcement officials stop and check the driver of every third vehicle for blood alcohol content.
Systematic
Twenty-five students are randomly selected from each grade level at a high school and surveyed about their study habits.
Stratified
A journalist interviews 154 people waiting at an airport baggage claim and asks them how safe they feel during air travel.
Convenience