Bias in Collecting Data

Determine the sampling method:

A psychologist is studying the sleep patterns of 4000 students at her university. She assigns each student a number and selects the sample by choosing every 50th number

• Stratified

• Cluster

• Convenience

• Systematic

An electronics manufacturer wants to know customers' opinions about a new media player. Emails with online surveys are sent to customers who purchased one. Only those who volunteer to respond complete the survey.

• Stratified

• Cluster

• Convenience

• Systematic

• Self-Selected

You want to determine if people in your neighborhood like the new neighborhood website. You randomly select a neighbor from each block.

• Convenience

• Stratified

• Cluster

• Self-selected

The principal asks students at one lunch table about the quality of food.

• Stratified

• Cluster

• Convenience

• Systematic

A computer science teacher wants to know how often students at a school access the Internet. The teacher uses a sample of students from one of her computer classes. Will this lead to biased or unbiased data?

• Biased

• Unbiased

Would you rather watch an award winning movie or just read some book?

Is this question biased or unbiased?

• Unbiased

• Biased

Your school principal randomly selects 5 students from each grade to complete a survey about school spirit.

• Biased

• Unbiased

Identify the data collection method:

A park ranger measures and records the heights of trees in a park as they grow.

• Experiment

• Observational

• Simulation

• Survey

A researcher uses a computer program to help determine how fast a virus might spread within a city.

• Survey

• Experiment

• Simulation

• Observational Study

A researcher places bacteria samples in two different climates. The research then measures the bacteria growth in each sample after 3 days.

• Simulation

• Experiment

• Observational Study

• Survey