AFDA Sampling and Bias

Front

Is Dylan's survey of the basketball team to rate the school cafeteria a biased sample of the school's population?

Back

Yes, because it is a convenience survey.

Front

Identify the Population: Wicomico County Public Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective.

Back

All Wicomico County Teachers

Front

Identify the Sample: A restaurant wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.

Back

20 customers

Front

If I wanted to know how many blades of grass are inside the track, which sampling method could I use?

Back

Divide the grassy area into 1 inch sections, randomly pick several sections to count, average them together and multiply that by the total square inches.

Front

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results? Options: thirty students who are often tardy, thirty students who are rarely tardy, thirty of her friends, thirty randomly selected students from her school

Back

thirty randomly selected students from her school

Front

What is the most favorite sport of 10th graders at CHS based on a survey conducted in office B Lunch?

Back

Biased because it is a volunteer sample

Front

The population describes: The group of people, objects or events being surveyed, a part of the group being surveyed, the whole world, the school

Back

The group of people, objects or events being surveyed

Front

True or False: all samples lead to a good prediction about an entire population.

Back

False

Front

How many candy bars do not have enough peanuts if the factory produces 20,000 candy bars and 15% did not have enough peanuts?

Back

3000