Data Samples & Bias

When researchers does not ask enough people to obtain a representative sample, this is called _______ bias.

(Ex: Only asking 2 students to represent 2,000).

• Non-response

• Under-coverage

• Gender

• Location

Tags

CCSS.HSS.IC.B.3

For which research question(s) would you need to use sampling?

• Asking group 6A at Rossman what their favorite class is

• Asking all of Rossman students what their favorite class is

• Asking your siblings what their favorite class is

• Asking all 6th graders in St. Louis what their favorite class is

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

You send out a research survey via text. This could potentially lead to which kind of bias?

• Non-response

• Undercoverage

• Gender

• Location

Tags

CCSS.HSS.IC.B.3

You want to know the average commute time for people who work in Downtown St. Louis. Select all research methods that would give you a biased sample.

• Asking females at a gas station downtown

• Asking 50 people at the Metro Station on Monday morning

• Asking 5 random people at each business place downtown

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Why/when do researchers use sampling?

Create a sampling scenario that would lead to location bias.

Tags

CCSS.HSS.IC.B.3

A ___________ is a small portion of a population that represents a larger group of people.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

How do you know if a sample is random?

• If all members are equally likely to be chosen

• If some members are more likely than others to be chosen

• If you pick every 50th person to walk through the door

Tags

CCSS.HSS.IC.B.3