A journalist wants to make a survey to determine the candidate who is the most likely to win the upcoming election. He decides to make a telephone survey and calls every working day at 3 pm.
Is the sample of this survey biased?
In a volleyball game, we asked the fans of both teams the following question:
What is your favorite sport? Is this sample biased?
In a high school with 1000 students and 25 classes, we randomly choose two students from each class to determine the percentage of students who are planning to attend college after graduation.
Is the sample of this survey biased?
We want to determine the favorite vacation destination of people living in our town. We randomly call 100 people and ask them the question.
Is the sample of the survey biased?
In a small town, 60 percent of the population have access to internet. We make 200 random internet calls to determine if people agree to cut half of the budget for public transportation and devote it to internet infrastructure so that more people in the town connect to the internet.
Is the sample of this survey biased?
We want to make a survey and ask people the following question:
What means of transportation do you prefer?
We go to an airport and randomly choose people who are waiting for their flight. Is this sample biased?
We have an amount of money and want to ask university students where to invest this money: athletic programs or music programs? We go to the university restaurant on lunch time and randomly choose one student from each table to make sample.
Is this sample biased?