Random and Representative Sampling

A school principal wants to see which subject the 695 students in his school liked best. Which choice BEST represents a representative sample?

• All girls in the school

• All students who have an A in Social Studies

• All students who are failing science

• 1 class from each grade level

• A
• B
• C
• D

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?

• thirty students who are often tardy

• thirty students who are rarely tardy

• thirty of her friends

• thirty randomly selected students from her school

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

• yes

• no

There are 30 people. 11 are picked to take a survey. What is the sample?

• All 30 people

• The 11 people who take the survey

• The 19 people who do not take the survey

250 people go to a soccer game. 4 people are picked to march in a victory parade. What is the sample?

• All 250 people

• The 4 people who get picked

• The 246 people who do not get picked

Jessica is studying students at Commodore who play instruments. She surveys 75 students in the school. What is the population?

• The 75 students who get picked

• All students at Commodore

• The students who do not get picked

• All people in the world

Mr. Martin wants to know if students prefer cheese or pepperoni pizza. He surveys 50 out of 900 students. What is the population?

• All 900 students at Commodore

• All students who like pepperoni pizza

• The 50 students who get picked

• All people in the world

Ms. Smyles randomly picks 2 students in the class to give a cookie. What is the sample?

• All students at Commodore

• All students in the class

• The 2 students who get a cookie

• The students who do not get a cookie

Sameer surveys 15 students in his class to get ideas for his science project. What is the population?

• All students at Commodore

• All students in Sameer's class

• The 15 people who get picked

• All people in the world