Variability & Bias + Article Review

What is the best definition of variability?

• A mistake that makes data unfair

• The natural differences in data values

• The way a question is asked in a survey

• A method for making sure results are accurate

Which of the following is an example of bias?

• Different students reporting different hours of sleep

• Surveying people at random from multiple grade levels

• Only asking your friends what they think about cafeteria food

• Recording the same result from multiple trials

In your own words, explain why variability is expected in real-world data.

Evaluate responses using AI:

OFF

What makes bias different from variability?

Evaluate responses using AI:

OFF

How could a survey question introduce bias? Give an example.

Evaluate responses using AI:

OFF

What was the primary goal of the student council's survey?

• To punish students for using phones

• To find out which apps students use most

• To gather data to support a social media ban during school

• To see how many students have phones

What percentage of survey students admitted to using their phones at least once a day during class?

• 35%

• 64%

• 81%

• 92%

Why might the timing and location of the survey have introduced bias?

• Only freshman were surveyed

• The survey was handed out in classes that encourage phone use

• Teachers collected the surveys unfairly

• Students were forced to answer publicly

Define variability and explain how it appeared in the survey results.

Evaluate responses using AI:

OFF

Identify one type of bias in how the survey was conducted. Why does this bias matter?

Evaluate responses using AI:

OFF