Samples, Bias, and Inferences

The population describes:

• The group of people being surveyed
• part of the group being surveyed
• the whole world
• the school

Tags

CCSS.7.SP.A.1

A ___ is a small portion of the population used to gather data from.

• Systematic Sampling Method
• Sample
• Population
• Bias

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

1. A sample in which every person, object, or event has an equal chance of being selected.

• A. Random sample.
• B. Biased sample.

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

6. 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?

• A. Thirty randomly selected students from her school
• B. Thirty students who are rarely tardy
• thirty of her friends

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

7. The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

• A. The students will be selected from the choir.
• B. The students will be selected randomly throughout the school.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

10. A teacher decides to survey the students in her classes to find out their opinion on the new menu in the cafeteria.  Is this biased or unbiased?

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

14. Biased questions lead people to answer a particular way.

• A. True
• B. False

Tags

CCSS.RL.11-12.6

16. Is the following question biased?

Fewer accidents occur at intersections with stoplights than at intersections that do not have stoplights. Would you be in favor of stoplights at the intersection of Main and Perry Streets?

• A. Not biased/ Unbiased

• B. Biased

A school randomly chose ten English teachers and asked them 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 in the sample

Tags

CCSS.7.SP.A.1

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2