Bias in Statistics

Why do we randomly select our samples?

• to control every aspect
• reduce bias
• so we don't get the same answers from everyone
• because it is easier to do

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

_________ is a sample in which each individual or object in the entire population has na equal chance of being selected.

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Leslie surveyed the 9 youngest students in the elementary school. Is this sample likely to be representative of all the students in the school?

• yes

• no

A U.S. senator from Maine wants to find out the opinion of the voters in his state on education issues. The office of the senator passes out surveys on ten street corners in the five major cities in the state of Maine. Is this random?

• Yes

• No

Marcos wants to find out how many students at his school like to go to the movies. Which survey method is likely to produce a representative survey?

• Ask the boys in the boys locker room.

• Ask the 25 students in his homeroom.

• Ask students coming out of a movie theater.

• Ask half of the 34 students on the soccer team.

Interview every 10th student who enters the school in the morning.

• simple random

• voluntary response

• systematic

• convenience

Tags

CCSS.L.1.6

CCSS.L.3.6

CCSS.RI.K.7

Dylan wants to know how the students at his school rate the cafeteria. He asked his school's basketball team to rate the cafeteria. Is this a biased sample of the school's population?

• Yes, because it only includes one group of people.

• No, the basketball team has the smartest students

• Yes, because it's voluntary survey

• No, he should have asked the football team

A school randomly asked ten English teachers which type of juice their students would prefer. Which reason best shows why this sample is biased?

• The sample didn't include students.

• The sample is too small.

• The sample can only be accurate if each teacher is included

Griffin is strongly opposed to the food in the school cafeteria, which is gross. After school he researches the laws and regulations that determine what can be served to eat in schools. He still does not like it, but he understands why the school cannot serve soda and candy. Is this bias?

• Yes

• No